一般过去时：simple past tense
一般现在时: simple present tense
一般将来时：simple future tense
现在进行时：present continuous tenses
过去进行时：past continuous tenses
将来进行时：future continuous tenses
现在完成时：present perfect tense
过去完成时：past perfect tense
将来完成时：future perfect tense
被动态passivtive voice
主动态active voice
