- English as a Second Language (ESL)
- Grammar
- Age 12+
-
level: pre-intermediate
- English
คำแนะนำของผู้เขียน
Add different forms of have to and must. Use contracted negative forms (don't, doesn't, didn't, mustn't) if necessary
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คำแนะนำของผู้เขียน
Add different forms of have to and must. Use contracted negative forms (don't, doesn't, didn't, mustn't) if necessary