Modal verbs (probability)

You______________ worry so much. It doesn't do you any good. Either you get the job, or you don't. If you don't, just apply for another one. Eventually, you will find work.

• don't have to
• can't
• shouldn't

Terry and Frank said they would come over right after work, so they_____________ be here by 6:00.

• have to
• should
• can

Tags

CCSS.L.4.1C

CCSS.L.9-10.1B

You____________ forget to pay the rent tomorrow. The landlord is very strict about paying on time.

• don't have to
• couldn't
• mustn't

When you are at the beach you _________ listen to the lifeguard.

• shouldn't
• must

Tags

CCSS.L.4.1C

CCSS.L.9-10.1B

My hands are full.I____________answer the phone right now.

• can't
• might not

The book is optional. My professor said we could read it if we needed extra credit. But we_______________ read it if we don't want to.

• don't have to
• must not
• cannot

Tags

CCSS.L.4.1C

CCSS.L.9-10.1B

You______ be rich to be a success. Some of the most successful people I know haven't got a penny to their name.

• shoudn't
• can't
• don't have to

That panda _____ be having fun. Or not. It's hard to tell.

• must
• could
• can't

She ______ feeling lonely. 

• must be
• could be
• might be

That heater ______ be very effective.

• must
• can't
• may