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Grammar point 41

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I’m sure that wasn’t her voice.

That can’t have been her voice.

That could be her voice.

That should have been her voice.

I’m sure you’re not serious!

You must be serious!

You can’t be serious!

You might be serious!

Perhaps I won’t come to your party.

I might not come to your party.

I should not come to your party.

I must not come to your party.

Perhaps I’ll go to the party.

I should go to the party.

I can’t go to the party.

I might go to the party.

I’m sure this is the place.

This must be the place.

This might be the place.

This should be the place.

Perhaps I’ll see you tomorrow.

I might see you tomorrow.

I can’t see you tomorrow.

I must see you tomorrow.

Perhaps they won’t finish on time.

They must not finish on time.

They can’t finish on time.

They might not finish on time.

Perhaps it won’t snow tomorrow.

It has not snowed tomorrow.

It can’t snow tomorrow.

It might not snow tomorrow.

I’m sure we are early.

We might be early.

We must be early.

We should be early.

I’m sure this isn’t the right way.

This might be the right way.

This must be the right way.

This can’t be the right way.

Perhaps she will call later.

She must call later.

She should call later.

She might call later.

I’m sure he’s at work now.

He must be at work now.

He might be at work now.

He should be at work now.

I’m sure this is right.

This must be right.

This should be right.

This can’t be right.

Perhaps it will rain.

It must rain.

It can’t rain.

It might rain.

I’m sure you left the keys at home.

You might have left the keys at home.

You can’t have left the keys at home.

You must have left the keys at home.

I’m sure that isn’t the answer.

That must be the answer.

That can’t be the answer.

That should be the answer.