1)You CANNOT park here it’s strictly forbidden.

2) CAN you TRY to understand his singing?

3)Children MUST wash their hands before taking meals.

4)She is too sick. She CANNOT walk and MUST stay in bed.

5)I had to go to the next shop, because I COULD NOT buy any bread in the nearest one.

6)You CANNOT smoke here.

7) The city is a big jungle where you CAN easily get lost.

8) Everybody OUGHT TO to escape from fire.

9) Elephants CAN carry big logs.

10) I used ____to sing well.

Explanation:

A modal verb is an auxiliary or supporting verb that is used to support the main verb in a sentence.

Some examples of modal verbs include can, could, may, might, will (shall), would, should, must and ought.