Pengayaan Materi Rules and Obligations SMP 13 Semarang

For Students who have passed the target, please study this following material for your enrichment assignment:

Obligation in Different Tenses
"Have to‟ in different tenses:

	subject	auxiliary verb	main verb have	to-infinitive
Past Simple	I		had	to work	yesterday.
Present Simple	I		have	to work	today.
Future Simple	I	will	have	to work	tomorrow.
Present Continuous	She	is	having	to wait.
Present Perfect	We	have	had	to change	the time.
modal may	They	may	have	to do	it again.

We can use must to talk about the present or the future. Look at these examples:
- I must go now. (present)
- I must call my mother tomorrow. (future)

We cannot use must to talk about the past. We use have to to talk about the past.

Fill the blank!
1. Yesterday I ________ finish my geography project.
2. She will ________ wait in line like everyone else.
3. If you are under 13 you _____ to get your parents' permission.
4. Do you _____ work next weekend?
5. Angela, you _____ leave your clothes all over the floor like this.

with this phrase: Had to | have to | have | have to | musn't | must

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