SENTENCES
She (can't /couldn't) find any books on Geology at the library right now.
can't
Name one modal verb that is used to give advice.
should / shouldn't / ought to / ought not to
True or false: The modal verbs Should and Shouldn't are only used to give advices.
false (advice & moral obligation)
Mobile phones are strictly forbidden during the TOEFL exams.
You ________ use mobile phones during the TOEFL exams.
mustn't / can't
I was so tired. I (could sleep / could have slept) for a week.
could have slept
Name one modal verb that is used to express obligation.
Must / Have to
Choose the correct modal verb: (should/shall/could) I go to the doctor?
should
You are not allowed to enter the supermarket without a mask on.
You ________ enter the supermarket with a mask on.
must
The doctor recommended that I (shall / should / could) see a specialist.
should
Which modal verb do we use to express prohibition?
must not / mustn't
I am so hungry. Let's buy something to eat, __________ we?
shall
Tomorrow I have a very important exam so I am going to study a lot.
I __________ study a lot because I have a very important exam tomorrow.
need to / have to / must
This is a valuable book. You (must / needn't) take good care of it and you (mustn't / don't need to) lose it.
must / mustn't
Name one modal verb that is used to express a lack of necessity.
don't need to / needn't have
You ____________ leave small objects lying around. Such objects _______ be swallowed by children.
shouldn't / ought not to , may / can
We went the wrong way and got lost. We ___________ (turn) right, not left.
should have turned
The teacher said we (can / needn't /must / should) read this book for our own pleasure as it is optional. But we (could / need / needn't / mustn't) read it if we don't want to.
can't , needn't
Name one modal verb that is used in questions indicating offers and suggestions?
I'm feeling sick. I ate too much.
I ______________ (eat) so much.
shouldn't have eaten
David was lucky. He ______________ (hurt) himself when he fell, but he is OK.
could have hurt