if从句的时态
if从句是英语的一个重要知识点，学习英语的人必须要掌握if从句的时态。下面是我为你整理的if从句的时态的相关资料，希望大家喜欢!
if从句的时态
当主句是一般现在时态时，从句也是一般现在时态：
当主句是一般过去时态时，从句也是一般过去时态;
当主句是一般将来时态时，从句便是一般现在时态
1.在时间或条件状语从句中，一般现在时也表示迅态将来。
例： We’ll go there if it doesn’t rain this afternoon.
这是固定的搭配法，如果都用i will to know if there will be a.....
这样就出现2个将来时了，事实上虽然都是没发生过都可以用将来时，但还是有动作的先后顺序的
2. 我想知道(I want to)肯定是一般的动作，如果(if)这种带假设的肯定是没发生，肯定是用将来时。
if从句的用法
if有两个意思：“是否”和“如果”.
当做“是否”讲时一般引导宾语从句,时态依据时间状语来做决定,
如：I don't know if he will come tomorrow.
当做“如果”讲的时候,又分为两种情形：
1.真实性条件状语从句,此时遵循“主将从现”原则,即主句用将来时,而if条件状语从句用一般现在时来代替将来时.
如：If it doesn't rain tomorrow,I will go shopping with my friends.
2.虚拟性条件状语从句,初中阶段常接触对现在和对将来的虚拟,此时主句多用过去将来时(would+动词原形),而从句用一般过去时(V-ed).
如：If I knew his telephone number,I would tell you.
if的释义及造句
conj.如果，倘若; 即使; 〈口〉是否; 假设
n.条件，设想;
1. If you wait, all that happens is that you get older.
如果你等待，发生的只有变老。
2. If you love life, life will love you back.
热爱生活，生活也会厚爱你。(Arthur Rubinstein)
3. If you're not satisfied with the life you're living, don't just complain. Do something about it.
对于现况的不满，不能只是抱启迟怨，要有作出改变。
4. Friendship means understanding, not agreement. It means forgiveness, not forgetting.It means the memories last, even if contact is lost.
友情是理解，不是妥协;是原谅，不是遗忘。即使不联系，感情依然在。
5. You have to do everything you can. You have to work your hardest. And if you do, if you stay positive, then you have a shot at a silver lining.
你需要尽你所能，最大限度地去努力。只要你这么做，只要你能保持乐观，你就会看见乌云背后的幸福线。
6. The house seemed muted, hushed as if it had been deserted.
房子里似乎悄然无声，安静得好像已经没人在住一样。悄昌李
7. He'd phoned Laura to see if she was better.
他打电话给劳拉看她是不是好些了。
8. Things might have been different if I'd talked a bit more.
如果当时我再多说一点的话，结果或许会不一样。
9. If your skin becomes red, sore or very scaly, consult your doctor.
如果皮肤发红、瘙痒或脱皮，要向医生咨询。
