Modal Verbs Environment

You shouldn't wear polyester clothing.

You should wear organic cotton.

​Should

You could try to reduce how much plastic you use.

You can start by not using straws!

Can/could

Offering Advice

​Must/Have to

You must not use plastic single use water bottles.

You have to get a metal reusable one.

This is more friendly, the meaning is more suggestive. The speaker is simply

This is slightly stronger, the speaker believes this is what the other person should do.

This is the strongest form of suggest, and the speaker is telling the other person what to do.

Multiple Choice

Make this sound like the person is required to complete this task:

You ______ rethink how you buy clothes.

• could

• should

• have to

• must

Multiple Choice

Make this sentence sound like one suggestion of many.

You ______ compost your food scraps to make dirt for your garden.

• could

• should

• have to

• must

Multiple Choice

Make this sentence sound like the speaker believes the listener ought to do the task.

You ______ really reduce the amount of food you throw away.

• could

• can

• should

• must

• have to