if從句的時(shí)態(tài)
if從句的時(shí)態(tài)
if從句是英語的一個(gè)重要知識(shí)點(diǎn)，學(xué)習(xí)英語的人必須要掌握if從句的時(shí)態(tài)。下面是學(xué)習(xí)啦小編為你整理的if從句的時(shí)態(tài)的相關(guān)資料，希望大家喜歡!
if從句的時(shí)態(tài)
當(dāng)主句是一般現(xiàn)在時(shí)態(tài)時(shí)，從句也是一般現(xiàn)在時(shí)態(tài)：
當(dāng)主句是一般過去時(shí)態(tài)時(shí)，從句也是一般過去時(shí)態(tài);
當(dāng)主句是一般將來時(shí)態(tài)時(shí)，從句便是一般現(xiàn)在時(shí)態(tài)
1.在時(shí)間或條件狀語從句中，一般現(xiàn)在時(shí)也表示將來。
例： We’ll go there if it doesn’t rain this afternoon.
這是固定的搭配法，如果都用i will to know if there will be a.....
這樣就出現(xiàn)2個(gè)將來時(shí)了，事實(shí)上雖然都是沒發(fā)生過都可以用將來時(shí)，但還是有動(dòng)作的先后順序的
2. 我想知道(I want to)肯定是一般的動(dòng)作，如果(if)這種帶假設(shè)的肯定是沒發(fā)生，肯定是用將來時(shí)。
if從句的用法
if有兩個(gè)意思：“是否”和“如果”.
當(dāng)做“是否”講時(shí)一般引導(dǎo)賓語從句,時(shí)態(tài)依據(jù)時(shí)間狀語來做決定,
如：I don't know if he will come tomorrow.
當(dāng)做“如果”講的時(shí)候,又分為兩種情形：
1.真實(shí)性條件狀語從句,此時(shí)遵循“主將從現(xiàn)”原則,即主句用將來時(shí),而if條件狀語從句用一般現(xiàn)在時(shí)來代替將來時(shí).
如：If it doesn't rain tomorrow,I will go shopping with my friends.
2.虛擬性條件狀語從句,初中階段常接觸對(duì)現(xiàn)在和對(duì)將來的虛擬,此時(shí)主句多用過去將來時(shí)(would+動(dòng)詞原形),而從句用一般過去時(shí)(V-ed).
如：If I knew his telephone number,I would tell you.
if的釋義及造句
conj.如果，倘若; 即使; 〈口〉是否; 假設(shè)
n.條件，設(shè)想;
1. If you wait, all that happens is that you get older.
如果你等待，發(fā)生的只有變老。
2. If you love life, life will love you back.
熱愛生活，生活也會(huì)厚愛你。(Arthur Rubinstein)
3. If you're not satisfied with the life you're living, don't just complain. Do something about it.
對(duì)于現(xiàn)況的不滿，不能只是抱怨，要有作出改變。
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，不是妥協(xié);是原諒，不是遺忘。即使不聯(lián)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.
你需要盡你所能，最大限度地去努力。只要你這么做，只要你能保持樂觀，你就會(huì)看見烏云背后的幸福線。
6. The house seemed muted, hushed as if it had been deserted.
房子里似乎悄然無聲，安靜得好像已經(jīng)沒人在住一樣。
7. He'd phoned Laura to see if she was better.
他打電話給勞拉看她是不是好些了。
8. Things might have been different if I'd talked a bit more.
如果當(dāng)時(shí)我再多說一點(diǎn)的話，結(jié)果或許會(huì)不一樣。
9. If your skin becomes red, sore or very scaly, consult your doctor.
如果皮膚發(fā)紅、瘙癢或脫皮，要向醫(yī)生咨詢。