si 用英语:

If two men always have the same opinion, one of them is unnecessary.

If you don't want to put on sunscreen, that's your problem. Just don't come complaining to me when you get a sunburn.

What if you gave a speech and nobody came?

If you're tired, why don't you go to sleep? "Because if I go to sleep now I will wake up too early."

Come if possible.

It's still too hard to find a job. And even if you have a job, chances are you're having a tougher time paying the rising costs of everything from groceries to gas.

I've heard it said that it's harder to please a woman than to please a man. I wonder if that's true.

The iPad would be a perfect solution for me if it could properly display web pages with Flash content.

If you want to sound like a native speaker, it's easier if you choose one dialect and stick with it. Native speakers don't usually mix dialects in everyday speaking.

If you can't visit a country where they speak the language you are learning, find a local bar where native speakers of that language hang out and start hanging out there.

Please advise us, if possible, of a company which has developed image processing software.

Tom wondered if Mary would think that eight in the morning was too early for him to open a bottle of wine.

Wouldn't it be great if a gender-neutral pronoun for "he" or "she" existed in English?

If you raise an eyebrow, it can mean "I want to have sex with you", but also "I find that what you just said is completely idiotic."

If my wife calls, just tell her I'm in an important meeting and cannot be disturbed.

Tom doubts whether Mary is honest.

Next, let us think about whether we have the time to look after a dog.

Our whole case hinges on whether the government's actions were constitutional or not.

I'm anxious whether I'll do well at this new job.

Human beings, whether they realise it or not, continually seek happiness.

Whether I'm sleeping or awake, this subject is always in my mind.

We went over the house before deciding whether to buy it.

Whether the news is true or false makes little difference.

When I was younger I could remember anything, whether it happened or not.

It's hard to love somebody when you don't know whether they love you as much as you love them.

I'm concerned whether or not I can handle a big job like that.

I'm wondering whether Tom would ever consider helping me with my homework.

I wonder whether a man could live with only two hours' sleep a night.

Computers are certainly playing an important role in our life, whether we like it or not.

Some companies are still debating whether to get Internet access.

Yes.

Yes, a man is as good as his word. But I'll just be helping, you understand. You'll have to work too.

When the bombs fell on our harbor and tyranny threatened the world, she was there to witness a generation rise to greatness, and a democracy was saved. Yes, we can.

This dictionary is useful to beginners, yes, and to advanced learners.

A scientist had to know how to ask the correct question and to state it so clearly that the answer would be, in effect, a definite yes or no, not "maybe".

Yes, thanks. Recently I've been roughing it so I was able to get a proper sleep for the first time in a while.

Your order? "Orange juice." "With ice?" "Yes." "Thanks for your business."

Hippopotomonstrosesquipedaliophobia is quite a long word, isn't it? "Yes, but do you know what it means?" "Actually, I don't." "It means fear of long words." "How ironic."

It was a big dumpster, Dima said. "And there was a lot of food, so... It wasn't exactly uncomfortable. But yes, smellier than a donkey's behind."

She was there for the buses in Montgomery, the hoses in Birmingham, a bridge in Selma, and a preacher from Atlanta who told a people that "We Shall Overcome." Yes, we can.

It's pool-season from this week, isn't it? "Oh yes. I've gotta go and buy a swimming suit, then."

My coach asked me if I was "unattached" and I didn't understand so I said yes.

If you stop loving the robot, it will take its revenge upon you "That robot will--" "Yes" " What type of revenge?" "It will kill you"

I had a nagging feeling that the atmosphere resembled somebody and, now that you mention it, yes, you're right. Certainly ZZ TOP had this kind of feel.

And tonight, I think about all that she's seen throughout her century in America — the heartache and the hope; the struggle and the progress; the times we were told that we can't, and the people who pressed on with that American creed: Yes we can.