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I'm learning English as a ESL student. In addition, I have never been to English-speaking countries, so I couldn't learn which grammar is no more useful these days. In my memory, I haven't seen any sentences using past continuous tense and future perfect tense in the articles that I read except grammar books. So I wonder these tenses are useful when native users speak or write something or they are just old grammar that few people use.

closed as too broad by Cascabel, sumelic, Skooba, bookmanu, tmgr Jan 22 at 23:43

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Both of them are useful and current.

I was walking to work this morning when I met John.

I will have finished reading the book by tomorrow.

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