在日常学习、工作或生活中，大家总少不了接触作文或者范文吧，通过文章可以把我们那些零零散散的思想，聚集在一块。那么我们该如何写一篇较为完美的范文呢？下面我给大家整理了一些优秀范文，希望能够帮助到大家，我们一起来看一看吧。
if引导的条件状语从句例句篇一
例如：
if i am free, i will come to see you.
= i will come to see you if i am free.
如果我有空，我就来看你。
2、 在含if引导的条件状语从句的复合句中，主句用一般将来时，从句通常用一般现在时态表示将来意义，即“主将从现”原则。
例如：
if it snows tomorrow, we will go skiing.
如果明天下雪，我们就去滑雪。
3、 在含if引导的条件状语从句的复合句中，语句的谓语还可含有情态动词can、must、may等，主句也可是祈使句。
例如：
if it stops raining, we can go out.
如果雨停了，我们就能出去。
4、 在含if引导的条件状语从句的复合句中，如果主句部分描述的是客观事实或真理，要用一般现在时。
例如：
if you heat the ice, it turns into water.
如果你加热冰，它就会变成水。
if引导的条件状语从句例句篇二
对过去的虚拟
条件从句(if):主语+had done 主句might/would/should/could+have done
对现在的虚拟
if+ 主语+动词过去式(be用were)主句 might/would/should/could+do
对将来的虚拟
if+主语+动词过去式(be用were)或主语+should do或主语+were to do
主句 might/would/should/could+do
e.g.
tom got to the station in time because he started earlier.
if tom had started late, he would have missed the train.
do you think the thief entered through the door?
no, if he had, i dont believe, he would have broken the living room window.
if the book werent so expensive, i would buy it.
if you didnt live so far away, we would be able to visit you more.
what would you do if you lost your passport in a foreign country?
why hasnt he come? if he should not come on time, we would have to put off the trip.
2、注意事项
e.g.
if she hadnt work hard at english in the past, she wouldnt work as well as a secretary in a large company now. 混合时间的虚拟语气 从句为对过去的虚拟，主句是现在。
had we not used an out-of-date timetable, we wouldnt have missed the train.
if引导从句的倒装从句相当于 if we had not used an out-of-date timetable, 同样，were还有should 在从句中都可以提前，省略if.
if only 要是。.。就好了
if only i were younger!
if only i had worked harder in my teenage years!
if only i should travel tomorrow!
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