The oven burners reignite automatically if blown out.
烤炉的火如果吹灭了会自动再点燃。
She asked me if I'd enjoyed my dinner.
她问我是否喜欢我的晚餐。
Our only complaint would be if the cheque bounced.
如果支票被拒收，这会是我们惟一的抱怨。
You may refer to your notes if you want.
如果需要，可以查阅笔记。
He gets ratty if he doesn't get enough sleep.
他要是睡眠不足动不动就发脾气。
Bankruptcy is a real possibility if sales don't improve.
如果销售情况得不到改善，真有破产的可能。
What if this doesn't work out?
如果这行不通怎么办呢？
But what if the government takes no heed?
但要是政府不理会该怎么办呢？
He looked as if nothing could faze him.
他显得镇静自若，遇事不惊。
Test to see if the finish is tacky, and if it is, leave it to harden.
测试一下看看最后一道漆是否还发黏，如果是的话，那就放着让它变硬。
She seldom, if ever, goes to the theatre.
她难得上剧院看场戏—即便不能说从来不去。
He'd phoned Laura to see if she was better.
他给劳拉打电话，看她是不是好些了。
Her joints ache if she exercises.
她的关节一运动就疼。
She asked if we had any questions.
她问我们有没有问题。
Anne shrugged, as if she didn't know.
安妮耸了耸肩，好像她不知道。
If you stand up straight, you'll give an impression of self-confidence, even if you're quaking in your boots.
只要你站直了，就会给人一种自信的印象，哪怕你正紧张得发抖。
Mary made as if to protest, then hesitated.
玛丽似乎要抗议，又犹豫了。
Ask for a refund if the goods are faulty.
商品如有缺陷，可要求退款。
He couldn't tell if she was laughing or crying.
他弄不清楚她是在笑还是在哭。
He threatened to fire me, as if I cared !
他威胁要解雇我，好像我多在乎似的。
They looked as if they hadn't washed in days.
他们看起来好像有好几天没洗澡了。
It looks as if the blaze was started deliberately.
看来那场火是有人故意放的。
If left unchecked, weeds will flourish.
如果不加遏制，杂草就会疯长。
What if the parachute doesn't open?
降落伞打不开怎么办？
If they overestimate, they lose revenue.
如果他们过高地估算，就会损失收入。
If push comes to shove, if you should lose your case in the court, what will you do?
如果情况不妙，你在法庭上输了官司，你会怎么办？
If he wins—and it's a big if —he'll be the first Englishman to win for fifty years.
假设他赢了—不过这还是个很大的疑问—他将成为五十年以来第一个获胜的英格兰人。
If he finds out, he'll scold me.
如果他发现了，他会责骂我。
If she notices, she never says so.
就算她留意到，她也从来不说。
He behaved as if nothing had happened.
他表现得若无其事。
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