[高中]全新語(yǔ)法:條件狀語(yǔ)從句 二、only if和if only的區(qū)別

二、only if和if only的區(qū)別

1.only if

（1）only if中，only是副詞修飾if，意為“只有……（才）”。

I will come home only if you come with me.除非你跟我一起走，我才回家。

I told him he would succeed only if he tried hard.我告訴他，只有努力才能成功。

（2）only if 可用作“only ...if ...”表示唯一的條件。

I will only come home if you come with me.除非你跟我一起走，我才回家。

The sale will only go ahead if the serial numbers match.

只有序號(hào)相符時(shí)，銷售才能繼續(xù)進(jìn)行。

（3）only if置于句首時(shí)，主句用倒裝語(yǔ)序。

Only if I get a job will I have enough money to go to school.

我只有找到工作才有足夠的錢上學(xué)。

Only if we have enough money will we visit Europe next year.

只要有錢，明年我們就去歐洲。

2.if only引導(dǎo)虛擬語(yǔ)氣，表達(dá)強(qiáng)烈的愿望，意為“要是……就好了”。

If only they had attended our wedding anniversary.

要是他們參加我們的結(jié)婚紀(jì)念日就好了。（與過(guò)去事實(shí)相反）

If only I were as clever as you！ 要是我像你一樣聰明該多好?。。ㄅc現(xiàn)在事實(shí)相反）

If she would only come！ 但愿她能來(lái)。（與將來(lái)事實(shí)相反）