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2．进行时 (1)进行时表示动作的未完成性、暂时性、感情色彩(赞赏、厌恶、遗憾等)，经常与always, constantly连用。 The lazy person always complaining about life.(厌恶) 这个懒惰的人总是抱怨生活。 (2)动词come, go, leave, stay, fly, arrive, begin, start, take等可用进行时表示将来。 I am taking my mother to spend the holiday next month. 下个月我将带着母亲去度假。 用括号内所给动词的适当形式填空 1．Whenever you ____________ (buy) a present, you should think about it from the receiver's point of view.(2017湖南) 2．If we don't act now to protect the environment, we________(live) to regret it.(2017课标Ⅰ) 3．We _________________(leave)very early so we packed the night before.(2017课标Ⅱ) 4．Look at the timetable.Hurry up！Flight 4026 _____________ (take)off at 18：20. 5．Mike's wife never gives him pocket money until he _________(explain) clearly how he will spend it. 【答案】1.buy 2.will live 3.were leaving 4.takes 5．has explained 六、常用的固定时态 1．It/This/That is/was the＋序数词＋time that…“这是某人第……次做某事”，that从句用现在完成时/过去完成时。如： This is the first time we have met in America. 2．It is /has been/was＋时间段＋since从句，从句中用一般过去时/过去完成时。如： It has been 3 years since I smoked. 3．It will (not) be/was(not)＋时间段＋before从句，从句中用一般现在时/一般过去时。如： It will be 2 days before the task is accomplished. 4．Hardly/Scarcely had…when…，No sooner had…than…中，when从句和than从句用一般过去时。如： Hardly had I arrived in Beijing when I rang up my father. | 
