动词和动词词组
第10讲
动词分类（一）
1，按其在动词词组中所起作用分：主动词和助动词
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主动词: 又叫实义动词，能独立作句子谓语成份  简单动词词组                                       复杂动词词组
助动词
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Examples:1.The workers received a raise last year.2.They have been taking music lessons.3.He needn't have been waiting in the rain.
基本助动词：be,do,have 情态助动词can,could,may,might,will,would,shall,should,need,must,dare,dared,ought to,used to 半助动词:have to,seem to,be about to,be due to,be going to ,be meant to,be meant to,be supposed to等.
一，基本助动词
be
1. be通惯用来帮助主动词组成进行体和被 ...