engVid quiz

Test your understanding of this English lesson

Test your understanding of the English lesson by answering these questions. You will get the answers and your score at the end of the quiz.
Which of the following sentences is the most polite way of asking permission to speak?

Which of the following sentences contains an incorrect use of "could"?

In addition to being an auxiliary verb, "could" is the past form of:

Which of the following contains the correct use of "could"?

If you use "could" to talk about possibility or potential, you're using the _______ form.

____________ I could run a mile in five minutes, but I can't anymore.

I ___________ dance the tango, but I can't anymore.

I'm sorry, but _____________ speak more slowly?

If someone says in a sad voice that he/she "could have done something", or "could have been somebody", what does it usually suggest?

"You're such a good singer. You could perform professionally."
This means that the person is _________ becoming a professional singer.

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78 Comments on “English Grammar: How to use the auxiliary verb ‘COULD’”

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Hi, teacher Gill.Thank you for teaching us English. I have a question about punctuation mark, and hoping you could answer and correct me. I always put a commma before IF. For example, in your video, the 3rd sentence: You could get good marks in the exam, if you study every day. This is what my normal practice to put a comma before “if”. But I read in a lot of places without a comma

Thursday, May 24th 2018

    hi Ian – thanks for your question. It’s not essential to put a comma before ‘if’ – it depends on the structure of the sentence, and often it’s quite an instinctive thing. In a short sentence it’s not so important, for example “He asked me if I was going to the party.” I hope this is helpful :-)

    Wednesday, May 30th 2018

      Ha, I hope I have more instinct on learning English grammar. Anyway, thank you for your replied.
      Have a nice day.

      Wednesday, May 30th 2018

Continue: before ‘if’, so I start wonder is it my normal practices are actually wrong? Please enlighten me.

Thursday, May 24th 2018

    Hi Ian,

    Actually, there is a simple rule:

    When the IF clause is the first in the sentence, it is followed by a comma. If the IF clause is the second clause, then normally there is no comma (unless the clause is just an extension/additional information to the sentence). The same applies to the usage of WHEN. A few examples:

    If I don’t know the person, I am less friendlier towards them.
    She could study in France if she spoke the language.
    Wake me up when you arrive.
    When you arrive, give me a call.

    All the best,

    Thursday, May 24th 2018

      Thank you for the explanation, David.
      Have a nice day to you.

      Thursday, May 24th 2018

Why not?I think that you could have been in a Hollywood film.
Thanks for this interesting lesson Mrs Gill.

Thursday, May 24th 2018

Thank you, Teacher…

Thursday, May 24th 2018

Gill, i got more familiar with the word, could, thanks to your course.

Thursday, May 24th 2018

Thank you for an useful lesson. I had so much pleasure to listen it. Clear voice, easy to recognise every word you saying. By the way , Actually You could’ve been a moviestar , coz when you said about that oportunity, I Imagined you as an actor in some comedy scene )) Dunno why

Thursday, May 24th 2018

Got 10 out 10 ))

Thursday, May 24th 2018

Thank you very much.

Thursday, May 24th 2018

Great lesson,as usual Thank you very much.

Thursday, May 24th 2018

I could have done 10 out of 10, but I missed one.

Thursday, May 24th 2018

My first lesson and very very useful video thank you so much Gill

Thursday, May 24th 2018

Nice lesson, thank you Gill!

Thursday, May 24th 2018

Excellent lesson Gill, thanks a lot ;)

Thursday, May 24th 2018

Thanks, I have gotten 90% ,but I could have100 % if I concentrate to the lesson explanation carefully.
Does this sentence correct ?

Thursday, May 24th 2018

    Hello, ….concerated on…

    Friday, May 25th 2018

      Thanks, you are right.

      Also I think you need to correct your sentence which you have written on your profile
      (I am learning) and not I learning

      Friday, May 25th 2018

        I think you are making a mistake. My sentence is correct. Check it again please.

        Friday, May 25th 2018

          Agree, your sentence is correct
          Kind regards

          Friday, May 25th 2018

      Many thanks; you are right.

      Friday, May 25th 2018

Thank you, Ms. Gill, for this lesson 😃🌷

Thursday, May 24th 2018

A very useful lesson. Thank you.

Friday, May 25th 2018

Thanks a lot madam. It’s an important lesson for me.

Friday, May 25th 2018

Miss! I got 70 in the test. I have figured out all of my errors except question number 8. Please explain me how come there is ‘possibly’? And how come there is not possible’

Friday, May 25th 2018

    hi Nuruzzaman – the correct answer is “could you possibly …” – ‘possible’ is the adjective, ‘possibly’ is the adverb. The adjective goes with a noun, the adverb goes with a verb. So “Could you possibly SPEAK more slowly” (speak = verb), or “It’s not possible for me to speak more slowly” (possible = adjective referring to ‘it’). I hope this helps :-)

    Wednesday, May 30th 2018

      you’re great my dear teacher !!!!!

      Saturday, June 16th 2018

All Thanks you,MS GILL

Friday, May 25th 2018

thanks dona.

Friday, May 25th 2018

I got 10 correct out of 10. Thank you Gill.

Friday, May 25th 2018

Good lesson.Thanks.

Saturday, May 26th 2018

Thanks Gill. Good Lesson.

Sunday, May 27th 2018

thank teacher for the lesson

Monday, May 28th 2018

Thanks for the tutorial🤗

Saturday, June 2nd 2018

Hi thank`s a lot. Your lessons are very interesting, useful and fascinating . Bless you!

Friday, June 8th 2018

Hello, Could I ask You?
You use always word “could ” in present tense. But in quiz 2 question is using past tense. Why?

Friday, June 8th 2018

I even got 90 out 100 lol, The lessons was very interesting

Friday, June 8th 2018

Such a useful and interesting lesson.
Thanks Mrs:Gill

Saturday, June 9th 2018

Excellent lesson.Thank you very much.(10×10)

Monday, June 11th 2018

Thank you, Gill. I got 9 out of 10. I missed question 7. I selected “was able to” instead of “used to be able to.” It sounds correct to me. Could you please explain to me why it is not a correct answer?

Tuesday, June 12th 2018

I got 9 of 10 and got more information about adverb and adjective through Mam Gil’s answer to the one who asked her. Thank you Madam.

Thursday, June 28th 2018

Thank you, Gill!

Friday, June 29th 2018

Best thing was pointing out the common mistake of COULD OF use instead of COULD’VE.

Great lesson. “Could you please make more such videos with comparision such as the use of could, might, may, shall, should, must. That will be very kind of you.

Thursday, July 12th 2018

Its really fantastic .
Thank you Gill,!!!!!

Tuesday, July 17th 2018

Thank you so much!! I love this website so much.

Wednesday, July 18th 2018

Hi! teacher Grill. Im so glap that i know this website because can help me improve my English and also listening. Thanks so much i hope have more video about grammar so that i can learn more.

Sunday, July 22nd 2018

Thanks. I have never hadn’t a idea “could” is capable of being a auxiliary verb. From now i get it ! and it’s gonna be helpful for me to understand English more easily.

Wednesday, July 25th 2018


Friday, July 27th 2018

Thank you Gill….I love your lessons…

Friday, August 10th 2018

Hi teacher Gill. Many thank for your great effort my teacher , I like your explanation , I always find yours.

Thursday, August 23rd 2018

Thank you.

Monday, September 10th 2018

Hi Mrs Gill I ask about the 4,5 condition I didn’t understand it very well could you explain more or give me another example I get 7/10 because I didn’t see the verb ING so I used able to and the other mistake I saw you explain it in the above comments could you possibly speak and the other mistake was about condition 5

Wednesday, September 26th 2018

I could be wrong, but I think you couldn’t have taught it better. Thank you.

Sunday, September 30th 2018

Thank you Gill, I liked your method of teaching.

Friday, October 5th 2018


Monday, October 8th 2018

Hi Gil… I have answared all the questions correctly, but I’ve got 90%. One of my answers have been changed out of my control. Is this kind of action could be happened usually by the quiz software normally?

All my greeting for you.

Saturday, October 27th 2018

Teacher Gill, thank you for inspiring me.

Monday, October 29th 2018

:D thanks. i could have done better. dr. strange

Saturday, November 17th 2018

Gill, thank you so much for lesson.

Thursday, November 29th 2018

I could have scored 10 out pf 10 but i missed one …
thanks to gill
I could be wrong about the following sentence please correct me if i am wrong
1)i could wake up early but i sleep little late.
2)i could have been gone to Australia but i didnt get a chance
3) at one time i could be a blogger like gill but i am not as capable as gill
please correct me if i am wrong anywhere your comments can be appreciated.

Friday, November 30th 2018

thank you for good lesson about how to use could in different different way. thank you so much

Thursday, January 3rd 2019

Thank you for this good explanation. Short and to the point!

Wednesday, January 9th 2019

thank you for this lesson. I’ve got a question. Is it correct to say that would is the past form of will when you use will for making promises or offering things? (obviously one of the use of would)

Friday, January 11th 2019


Saturday, March 2nd 2019

I could have better degree in the exam but I took exam quickly.

Thursday, April 4th 2019

Thanks for the wonderful lesson

Tuesday, June 4th 2019

Lovely lesson !

Saturday, July 6th 2019

Got 80 but really wonderfull.

Friday, July 26th 2019

Hi Gill! it’s a beautiful lesson as always. I adore your way of teaching, speaking and how you explain the subject! Thank you infinitely! <3.

Monday, July 29th 2019

Gill, thank you for this lesson. I learned again some things.

Tuesday, October 29th 2019

Thank you, dear teacher!

Wednesday, November 20th 2019

Thanks Gill. Could I ask you to do more such interesting lesson. By the way I have got 9

Wednesday, March 18th 2020

Dear Gill, thanks a lot for all the lessons provided to us, They are too helpfull. So,
Could you please let me know the different betwen a Present continuous tense and Present participle tense?

Tuesday, May 19th 2020

thank you very much ! Gill.

Wednesday, June 3rd 2020

I got 9.Thank you for this lessons now I had a clearer understanding in using,should,would and could.Amazing….

Thursday, June 25th 2020

I got 9 out of 10. I’m still watching your videos to improve my English and it helps me a lot. Thank you teacher.

Saturday, July 11th 2020

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