1.(表示條件)如果 He will come if you invite him. 如果你請他,他會來的。
2.(表示虛擬)假如,要是 If I were you, I would never do that. 如果我是你,我決不做那件事。
3.(表示讓步)即使 We"ll go even if it rains. 即使下雨我們也要去。
4.是否 I wonder if she is ill. 不知她是否病了。
5.(表示因果關係)每一次...的時候(總是會) If I feel any doubt, I inquire. 我一感到有疑問就隨時詢問。
從句位置:
從句可放在主句前面,此時要用逗號分開,也可放在主句後面。
如:1、If it doesn"t rain tomorrow , we will go shopping .(if it doesn"t rain tomorrow是從句)= We will go shopping if it doesn"t rain tomorrow.如果明天不下雨,我們就去購物。
2、He will come if you invite him. (if you invite him 是從句)=If you invite him , he will come . 如果你請他,他會來的。
if引導條件狀語從句,遵循主將從現原則,if後是從句。
if 做連詞時:
1.(表示條件)如果 He will come if you invite him. 如果你請他,他會來的。
2.(表示虛擬)假如,要是 If I were you, I would never do that. 如果我是你,我決不做那件事。
3.(表示讓步)即使 We"ll go even if it rains. 即使下雨我們也要去。
4.是否 I wonder if she is ill. 不知她是否病了。
5.(表示因果關係)每一次...的時候(總是會) If I feel any doubt, I inquire. 我一感到有疑問就隨時詢問。
從句位置:
從句可放在主句前面,此時要用逗號分開,也可放在主句後面。
如:1、If it doesn"t rain tomorrow , we will go shopping .(if it doesn"t rain tomorrow是從句)= We will go shopping if it doesn"t rain tomorrow.如果明天不下雨,我們就去購物。
2、He will come if you invite him. (if you invite him 是從句)=If you invite him , he will come . 如果你請他,他會來的。