...从句中用作动词left的宾语，故可以省略。Do you
still remember the boy (who, whom) I was going out with? 你还记得那个跟我约会的小伙子吗?句中的(who, whom) I was going out with为修饰the boy的定语从句，引导定语从句的关系代词who / whom在定语从句...
..., as 后的人称代词后跟有动词，则必须用主格。如：I
swim better than him.＝I
swim better than he does. 我游泳比他好。另外，还有一点要特别注意，就是在口语中，当人称代词单独使用时，通常用宾格。如：“Who’s
there?” “Me.” “是谁...
....
使感染；传染 germ /dʒɜːm/ n. 微生物；细菌；病菌 subscribe /səbˈskraɪb/ vi.
认购(股份)；定期订购；定期交纳(会费) subscribe to
同意；赞同 proof /pruːf/ n. 证据；证明；检验 multiple /ˈmʌltɪpl/ adj.
数量多的；多种多样的 pump /pʌmp/ n. ...