Must and should

 "Must" and "should" are both modal auxiliary verbs that express obligation, but with different degrees of urgency or importance. "Must" implies a strong obligation or requirement, while "should" implies a recommendation or advice.

Here's a chart to help explain the differences between "must" and "should":

Modal Verb	Meaning	Example Sentence
Must	Strong obligation, requirement	You must submit your assignment by the deadline.
Should	Recommendation, advice	You should get plenty of rest before the exam.

Note: The meanings listed in the chart are not exhaustive, but provide a basic overview of their primary uses.

Here are some exercises to practice using "must" and "should" correctly:

1. Choose the correct form of "must" or "should" to complete the sentences:

• You __________ brush your teeth before going to bed. (must/should)
• We __________ start studying for the test soon. (must/should)
• He __________ visit his grandparents this weekend. (must/should)
• They __________ read the instructions carefully before starting the experiment. (must/should)

2. Write sentences using "must" and "should" to express obligation and recommendation:

• You __________ finish your work before you go on vacation. (must/should)
• She __________ take a break and relax for a while. (must/should)
• They __________ wear helmets when riding their bikes. (must/should)

Answers:

1. must, should, should, must
2. must, should, should

I hope these exercises help you practice using "must" and "should" correctly!