if的意思是“是否”和whether的意思一樣并且二者同是連接詞,可是這二者有什么區別呢,究竟該怎么用呢?
熱心網友
whether和if都可以引導賓語從句,表示"是否",在口語或間接引語中兩者可以互換使用。如: I wonder if / whether I can get some advice from you。 Ask him whether / if he can come。 但在有些情況下,whether和if的用法有一定區別。 1。 whether引導的從句??梢耘c連詞or或or not直接連用,而if一般不能。如: 正: Let me know whether you can come or not。 誤: Let me know if you can come or not。 2。 當賓語從句提到句首時,只能用whether引導,而不能用if。如: 正: Whether it is true or not, I can't tell。 誤: If it is true or not, I can't tell。 3。 whether可以引導帶to的不定式,if則不能。如: 正: I don't know whether to accept or refuse。 誤: I don't know if to accept or refuse。 4。 whether及其引導的成分可放于介詞之后,作介詞的賓語,但if不能。如: 正: I worry about whether I hurt her feelings。 誤: I worry about if I hurt her feelings。 5。 whether可以引導從句,作主語、表語或同位語,而if不能。如: 正: It was uncertain whether he would come。 誤: It was uncertain if he would come。 正: His first question was whether Tom had arrived yet。 誤: His first question was if Tom had arrived yet。 正: We must consider the question whether we will take these measures。 誤: We must consider the question if we will take these measures。 。
熱心網友
1, if ,whether 都可 引導賓語從句, 但如后邊有or not , 一般用whether;I don't know whether he comes (or not.)2,whether 可以引導名詞從句, if不行;whether he comes or not depends on the weather.(主語)3, if(如果)可以引導狀語從句, whether不行;If it is fine tomorrow, I'll come to see you.
熱心網友
上面說的太全了,但是只說了兩個詞引導賓語從句時的不同。我補充一點,if ,whether的另一個區別就是if 能引導條件狀語從句但是whether不能。注意這里是狀語了哦。上面說的是賓語。