一般现在时：主语＋be<am,is,are>+-- 主语＋do/does sth---
现在进行时：主语＋be<am,is,are>+doing sth ---
现在完成时：主语＋have/has +过去分词＋－－－
一般过去时：主语＋be<was,aere>+-- 主语＋did sth+---
过去进行时：主语＋be<was,were>+doing sth + ---
过去完成时：主语＋had +done sth ---
一般将来时：主语＋be<am,is,are> going to do sth ---
主语＋will/shall do sth ---
主语＋be<was,were> going to do sth ---
主语+would/should do sth ---
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