Grammar Rules: Past Habits, Adverbs, Obligation, Comparison
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Used to vs. Would
To talk about habits and continuous actions in the past, we can use used to or would.
- We use used to with both action and stative verbs.
- We only use would with action verbs.
- We use both would and used to with repeated actions.
Adverbs and Adverbial Phrases
We often form adverbial phrases with:
- in a/an + noun/adjective + way
- with/without + noun/adjective
Obligation, Permission, and Prohibition
To express obligation or necessity, we can use have to or must. To say something is (or isn't) a good idea, we can use should. To express no obligation or necessity, we can use don't have to or don't need to. To express permission, we can use let, and to say that something is not permitted, we use not to be allowed to.