小学英语语法:时态中的助动词:
一般将来时: will, shall
过去进行时: was, were
过去完成时: had
过去将来时: would
一般现在时: do, does/am, is, are
现在进行时: am, is, are
一般过去时: did
现在完成时: have, has
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