CONTINUATION OF HOMEWORK

• Must

We use must to express something that you or other people think it is a serious obligation. This form is used only in the present and future.

Examples:

We must pay our taxes.

Children must obey their parents.

We use must to express speculations, when you are 100% (or almost 100%) sure that something is correct or true.

Examples:

It must be raining. Listen!

My father must be at the office. His car is in front of his office.

These modals follow the same patterns:

Affirmative pattern

Subject + modal auxiliary + verb in simple form + complement.

I can speak English well.

We could run fast 10 years ago.

We must pay our taxes.

We should study everyday.

Negative pattern

Subject + modal in negative + verb in simple form + complement.

I can´t play the guitar.

They couldn´t swim 5 years ago.

We mustn´t destroy trees.

She shouldn´t drive so fast.

Interrogative form

Modal auxiliary + subject + verb in simple form + complement + ?

Can you dance salsa?

Could he drive 5 years ago?

Must we enter now?

Should people save water?