?③ 一般过去时
?表示过去发生的动作,过去的习惯或反复发生的动作。如: Who broke the window? In those days, I studied hard at night every day. 与过去时连用的时间状语有: at that time, ago, in 1949, just now (刚才), last night, yesterday
?④ 一般将来时
?纯将来时的表示法: shall/will+动词原形
?例: I'll leave for Shanghai this evening.
?表示按计划要做或可能做的事: be going to+动词原形
?例: I'm going to help you tonight.
?将来时的特殊表示法
?a. be+coming/leaving/going/starting/arriving
?例: Don't worry. I'm coming.
?b. be about to+动词原形
?例: He is about to leave, when the telephone rings.
?c. 状语从句中用一般现在时表示将来
?例: If it rains tomorrow I won't go to the party.
?(2) 情态动词:
?can: 能,会
?例: He can do it very well.
?may: 许可,可能性
?例: May I use your pen?
?must: 必要,禁止(多表示主观看法)
?例: You mustn't play with fire.
?have to: 不得不(多表示客观之事)
?例: I have to go, because I have a meeting.
?could与would:二者用于现在时表示语气的委婉
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