b. John is coming here next week.
③.现在进行时动词与always, continually, constantly等连用, 表示反复出现的或习惯性的动作
a. The little boy is always asking questions.
b. You are always saying that sort of thing.
④.在一定的上下文中, 前一句用一般现在时动词表述现在发生的事实, 后一句用现在进行时动词来阐述这一事实的原因, 结果, 目的等
a. He frowns. He is worrying about his boy.他皱着眉头, 因为他在为他的孩子担心. (is worrying表示原因)
b. She criticizes him. She is trying to correct his wrong habits. 她批评他, 想纠正他的坏习惯. (is trying表示目的)
c. She lets her child have his own way. She is spoiling him. 她不管她的孩子, 把他惯坏了. ( is spoiling表示结果)
⑤.不表示持续的行为, 而表示知觉, 感觉, 看法, 认识, 感情, 愿望或某种状态的动词通常不用现在进行时, 如: see, hear, smell, taste, recognize, notice, forget, remember, understand, know, believe, suppose, mean, think, love, hate, care, like, dislike, worry, forgive, want, wish, hope, refuse, feel like, belong to , possess, own, have, be, seem等
三.现在完成时:
1.构成: have / has done
2.用法:
①.表示动作在说话之前己经完成, 而后果或影响至今仍存在
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