冠词是虚词,本身不能单独使用,也没有词义,它用在名词的前面,帮助指明名词的含义。英语中的冠词有三种,一种是定冠词(the definite article),另一种是不定冠词(the indefinite article),还有一种是零冠词(zero article)。 不定冠词a (an)与数词...
不定式可放在be动词后面,形成表语。例如: my work is to clean the room every day his dream is to be a doctor ...
1) 动词+宾语+不定式(to do)advise allow appoint believe cause challenge command compel consider declare drive enable encourage find for...
1) 动词+ 不定式 afford aim appear agree arrange ask be decide bother care choose come dare demand desire determine expect elect...
1) 表示目的;它的否定式是so as not to do。 tom kept quiet about the accident so as not to lose his job 汤姆对事故保持沉默是为了不丢掉他的工作。 go in quietly so as not to w...