Question

1．一有人求助，他就會伸出援手．
He will give a handas soon as someone asks for help．

Answer 1

分析 as soon as someone asks for

解答 答案：as soon as someone asks for．表示一…就用as soon as引導的條件狀語從句，遵循主將從現(xiàn)的規(guī)則，從句主語someone，謂語動詞用單數(shù)，ask for help求助，故答案是as soon as someone asks for．

點評 as soon as 的用法一般是兩種情況：
1、指未發(fā)生的動作，規(guī)律是：主句一般將來時，從句用一般現(xiàn)在時代替一般將來時
如：I will tell him the news as soon as he comes back．
注：有時，為了特意表達剛剛完成某事就如何如何，需要用現(xiàn)在完成時．
如：I will go with you as soon as I have washed my face．
2、指緊接著發(fā)生的兩個短動作，主從句都用一般過去時
如 He took out his English books as soon as he sat down
不過，我也見過從句和主句都用一般現(xiàn)在時的情況．