*The auxiliary verbs help the main verb.We also call them the helping verbs.By using helping verbs ,we can negate...
could/should/have+p.p
*Could have +p.p.
-It means that I was able to do something in the past but I didn't do it:(There are a lot of causes...
Some and Any
*Some and any go before uncountable nouns or plural countable nouns.
*Some is used in positive sentences but any...
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