comparison
past modals
word formation
present/future modals
100

It's the most beautiful painting I've ever seen. SEEN
I _____ beautiful painting.

have never seen such a

100

It wouldn't have been right to leave you to do all the work on your own. COULDN'T

I _____ to do all the work on your own.

I couldn't have left you to do all the work on your own.

100

The police searched the house _____. (SYSTEM)

systematically

100

I’m sure you’ll see Paula if you go there. BOUND    

You’re ____________ see Paula if you go there.

bound to

200

The course wasn't as easy as I'd expected. MORE
The course ____ I'd expected.

was more difficult than

200

Perhaps they didn't notice the tire was flat. MIGHTN'T

They _____ the tire was flat.

They mightn't have noticed (that) the tire was flat.

200

He is a _____-paid senior executive. (HIGH)

highly

200

I think you should take up jogging. WERE           

If I _____________ take up jogging.

were you, I would (I'd)

300

This car isn't safe enough to drive. DANGEROUS
This car _____ drive.

is too dangerous to

300

All that trouble I went to wasn't necessary in the end. NEEDN'T

I _____ all that trouble.

I needn't have gone to all that trouble.

300

The importance of this _____ has been extremely overrated. (INVENT)

invention

300

It’s the law to turn left here. MUST     

You ____________ left here.

must turn

400

I'm not as good at maths as you. BETTER
You _____ me.

are better at maths than

400

Apparently, someone has borrowed the remote control. HAVE

Someone _____ the remote control.

Someone must have borrowed the remote control.

400

She's a specialist in psychology and human _____. (BEHAVE)

behavior

400

It’s possible that this kind of snake is poisonous. COULD    

This snake __________ the poisonous kinds.

could be one of

500

The computer was too expensive for me to buy. ENOUGH
I _____ money to buy the computer.

didn't have enough

500

I'm disappointed that you didn't back me up! MIGHT

You _____ me up!

You might have backed me up!

500

He took a job as a sales _____ in a big department store. (ASSIST)

assistant

500

Although it’s summer, the temperature is more like winter. MAY     

It __________ the temperature is more like winter.

may be summer, but

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