To do such things is foolish. To see is to believe. (对等) 注: 1). 不定式作主语时,谓语用单数 2). 当主语较长,谓语较短时,常用it做形式主语,而将不定式放到谓语的后面。 it做形式主语,不定式放在谓语动词之后常用于下列结构中: (1)It is/was +adj.+of sb. to do...
Not knowing her address, I wasn't able to contact her. = Because I did not know her address, I wasn't able to contact her. 三、表条件,可以和条件状语从句互换。如: Walking to work, you will save quite a lot of money.= If you walk to work, you will sa...
因为can不能和其他助动词连用,所以表示将来式时用will be able to 如:You will be able to skate after you have practiced it two or three times.你练习两三次后就会溜冰了。 ⒉ 表可...
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