現(xiàn)在進(jìn)行時(shí)

　　現(xiàn)在進(jìn)行時(shí)主要表示現(xiàn)在或現(xiàn)階段正在進(jìn)行的動(dòng)作�？膳cnow， at present， at this moment， these days等時(shí)間狀語連用。

　　現(xiàn)在進(jìn)行時(shí)的謂語形式：am / is / are +現(xiàn)在分詞。

　　What are you doing， Jack? We're trying to plan our future.

　　The train is now rapidly approaching the city.(approach 接近)

　　Life is changing all the time. The woman who is standing here is my mother.

　　動(dòng)詞go， come， leave， stay， arrive， die 等用于進(jìn)行時(shí)態(tài)中，可以表示將要進(jìn)行的動(dòng)作。

　　The bus is leaving， please hurry up. It's going to rain. Don't forget to take the umbrella.

　　My uncle is coming to see us this weekend.

　　The boy is leaving for Beijing tomorrow.(leave for 動(dòng)身)

　　1. Health experts in many countries still ________ their ideas about the relationships between our food and our health.

　　A. have tested B. tested C. are testing D. test

　　still(仍舊)一般用于進(jìn)行時(shí)。 still一般放在系動(dòng)詞后面，實(shí)義動(dòng)詞前面。 答案 C

　　2. What is this noise? Tell me what _______ here. A. went on B. goes on C. is going on D. will go on 答案 C

　　過去進(jìn)行時(shí)

　　過去進(jìn)行時(shí)主要表示過去某個(gè)時(shí)刻或一段時(shí)間內(nèi)正在進(jìn)行的動(dòng)作。

　　過去進(jìn)行時(shí)的謂語形式：was / were + 現(xiàn)在分詞。

　　My son was practicing the piano this time yesterday evening.

　　When I called him， he was having his breakfast.

　　While we were having a meeting， Mary came in and told us the terrible news.

　　I was leaving the room when the telephone rang.

　　1. James has just arrived， but I didn't know he _____ until yesterday.

　　A. will come B. was coming C. had been coming D. comes

　　現(xiàn)在完成時(shí)表明的是過去的動(dòng)作對現(xiàn)在的影響或持續(xù)到現(xiàn)在。

　　had been過去完成時(shí)，表示過去的過去。 was coming用過去進(jìn)行時(shí)表示將要的動(dòng)作。答案 B

　　2. “What were you doing when Anna phoned you?”

　　“I had just finished my work and _______ to take a bath.'

　　A. starting B. to start C. have started D. was starting

　　what were you doing提問的是過去進(jìn)行時(shí)。 答案 D

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