全部

1·If the weather is good tomorrow, we'll go to the park.

如果明天天气好，我们就去公园。youdao

2·I want to know if you will attend the party.

我想知道是否你会参加聚会。youdao

3·If you study hard, you'll get good grades.

若你努力学习，你会取得好成绩。youdao

4·If you need help, ask me anytime.

假如你需要帮助，随时问我。youdao

5·If you like this book, take it.

要是你喜欢这本书，就拿走吧。youdao

6·If you are thirsty, drink some water.

当你口渴时，喝点水。youdao

7·If it rains, we can still have a good time.

即使下雨，我们也能玩得开心。youdao

8·If you have time, come to see us.

若是你有时间，来看看我们。youdao

9·If you try new things, you'll have new experiences.

倘若你尝试新事物，你会有新体验。youdao

10·If she invites you, you should go.

如果她邀请你，你就去。youdao

如果

1·You can stay here if you like.

如果你愿意的话，你可以呆在这里。《柯林斯英汉双解大词典》

2·You may come if you wish.

如果你愿意可以来。《牛津词典》

3·You can take the car, if you want.

如果想用那辆车，你就尽管用吧。《牛津词典》

4·I can take the car if necessary.

如果必要的话，我可以乘汽车去。《牛津词典》

5·What will you do if you fail?

如果你考试失败打算干什么？《牛津词典》

是否

1·Go outside and see if it's raining.

去外边看看是否下雨了。《牛津词典》

2·Alex asked me if I wanted a massage.

亚历克斯问我是否需要一次按摩。《柯林斯英汉双解大词典》

3·I wonder if you can help me.

不知您是否能帮我的忙？《牛津词典》

4·She asked if I would help.

她问我是否会帮忙。《牛津词典》

5·I'm not sure if Friday's trip is a go.

我说不准星期五是否能成行。《牛津词典》

若

1·I'd be glad if you could help me.

你若能帮助我，我会非常感激。《牛津词典》

2·The money's there if you need it.

你若需要用钱就来取好了。《牛津词典》

3·Let me know if you have any problems.

你若有困难就告诉我。《牛津词典》

4·You'll fry on the beach if you're not careful.

若在海滩上不小心会被太阳灼伤的。《牛津词典》

5·I would work better if I had some peace and quiet.

四周若再安静一些，我会干得更好。《牛津词典》

假如

1·I would appreciate it if you paid in cash.

假如你支付现金的话，我会不胜感激。《牛津词典》

2·I should wait a little longer, if I were you.

假如我是你的话，我会再等一会儿。《牛津词典》

3·You can hire a car if you want to explore further afield.

假如你想逛更远的地方，可以租辆汽车。《牛津词典》

4·Doctors cannot effect a cure if the disease has spread too far.

假如这种疾病已扩散得厉害，医生也无法妙手回春。《牛津词典》

5·I dread to think what would happen if there really was a fire here.

我不敢想象假如这儿真的发生火灾会是什么情景。《牛津词典》

要是

1·She'll throw a fit if she finds out.

她要是发现了，一定会大发雷霆。《牛津词典》

2·I'll help you if you're stuck.

你要是难住了，我来帮你。《牛津词典》

3·It would be a shame if you lost it.

你要是把它丢了就太可惜了。《牛津词典》

4·Ask me if you're not sure how to do it.

你要是拿不准怎么干，就问我。《牛津词典》

5·It would be nice if he moved to London.

他要是搬到伦敦就好了。《牛津词典》

当

1·Wire the thermometers up to trigger off an alarm bell if the temperature drops.

把温度计的电线连接上，当温度下降时，就会触发警报。《柯林斯英汉双解大词典》

2·They are dangerous only if programmers are careless.

只有当程序员粗心大意时，它们才是危险的。

3·But I ask my father if he texts messages, and guess what he said?

但当我问我爸爸他有没有发短信时，猜猜他说了什么？

4·I am certain of it, especially if it's difficult for a competitor to copy.

我对此非常确信，尤其是当竞争对手很难抄袭的时候。

5·I generally go to the gym or go for a run, especially if I've had a bad day.

我通常会去健身房或者去跑步，尤其是当我度过了糟糕的一天的时候。

即使

1·It was a warm day, if not exactly hot.

这一天即使算不上热，也是一个暖和的日子。《牛津词典》

2·The implication was plain, if left unstated.

即使不说出来，隐含义也很明显。《柯林斯英汉双解大词典》

3·Such measures are desirable, if not essential.

这些措施即使不是必要，也是可取的。《牛津词典》

4·It wouldn't surprise me if they got married soon.

即使他们很快就结婚，我也不会感到意外。《牛津词典》

5·The government had a moral, if not a legal, duty to pay compensation.

政府即使没有法律上的义务也有道义上的义务进行赔偿。《柯林斯英汉双解大词典》

若是

1·Correct me if I'm wrong , but isn't this last year's brochure?

这不是去年的小册子吗？若是我说错了就请指出。《牛津词典》

2·Take care lest an adventure is now offered you, which, if accepted, will plunge you in deepest woe.

要当心你们面临的这场冒险，你们若是接受，这场冒险就回让你们陷入大祸事。

3·Usually, if the tea is made in a teacup, boiling water should be added into the cup when half of the tea in it has been consumed; and thus the cup is kept filled and the tea retains the same bouquet.

通常，若是用茶杯泡的茶，在茶喝完一半之后就应该加开水，这样，茶杯就一直都是满的，茶的芳香也得以保留。

4·If the wheel axle pin squeaked, or the beam had sapwood in it, or the haystack leaned, everyone in the village would know who had done these.

若是车轮的轴销嘎吱作响，或是横梁里掺了边材，或是干草堆斜歪了，村里的所有人都会知道这是谁干的。

5·If I were you, I would go.

我若是你，我就去。《新英汉大辞典》

倘若

1·If you went to see him, he would be delighted.

倘若你去看望他，他会高兴的。《牛津词典》

2·If and when we ever meet again I hope he remembers what I did for him.

倘若我们再次见面，我希望他还记得我为他做的事。《牛津词典》

3·If we look at the larger picture of the situation, the differences seem slight.

倘若我们对情况看得全面些，分歧看起来就微不足道了。《牛津词典》

4·If you can't trust anything, life becomes intolerable.

倘若你什么都不相信的话，生活就会变得难以忍受。

5·However, I do not have any fears about this theory if the monopoles are not discovered.

然而，倘若真的没有发现磁单极子，我对这个理论也没有任何担心了。

(1)as if犹如，好似

(1)if any若有的话；即便要

(1)if so如果是这样的话；要是这样

(1)if only只要；要是…多好

(1)if ever假如，要是；如果真有(我当真)

(1)if at all如果某事真会发生的话；如果某人真要做某事的话