Must and have to: obligation

 "Must" and "have to" are both used to express obligation, but there are some differences in how they are used. "Must" is more often used for personal obligations or requirements, while "have to" is more often used for external or imposed obligations. Here is a chart to help explain the differences:

Modal Verb	Meaning	Example Sentence
Must	Personal obligation,	I must finish my homework before going to bed.
	requirement	She must study for the test tomorrow.
Have to	External or imposed	I have to attend the meeting tomorrow.
	obligation, necessity	They have to wear safety gear while working.

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

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

• I __________ wear a helmet when riding my bike. (must/have to)
• She __________ clean her room before going out with friends. (must/have to)
• We __________ submit our application by the deadline. (must/have to)
• They __________ study for the test if they want to pass. (must/have to)

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

• You __________ finish your work before you go on vacation. (must/have to)
• He __________ attend the meeting tomorrow. (must/have to)
• They __________ follow the safety rules in the lab. (must/have to)

Answers:

1. have to, must, have to, must
2. must, have to, have to

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