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.

Don't ask such hard questions.

Crashes in the early days of commercial jets tended to be caused by technical faults, such as metal fatigue in the airframe or engines.

Such a lifestyle appears rather uninteresting to Americans.

Food and drink were served in such profusion at the wedding that the bride and groom began to wonder if they should not have invited more guests.

If you had taken my advice, you wouldn't be in such trouble.

Such toys have a bad influence on children.

She grows flowers such as tulips, pansies and daisies.

In countries such as Norway and Finland, they have lots of snow in the winter.

Such a person invariably expends his physical energy more slowly.

Such a person will often go a block out of his way to avoid meeting a person of the opposite sex.

How did she get mixed up with such unpleasant people?

He and I are such close friends that we can almost read each other's minds.

If he had given up smoking then, he might not be suffering from such a disease.

I will take such action as seems necessary.

His family circumstances were such that he became a teacher out of necessity.

I slept a little during lunch break because I was so tired.

So what?

You don't want to get wet and catch a cold, so take this umbrella with you.

There's also a great deal of so called behind-the-scenes work.

Pioneer men and women had a hard life, and so did their children.

His essay gave only a superficial analysis of the problem, so it was a real surprise to him when he got the highest grade in the class.

When I ask people what they regret most about high school, they nearly all say the same thing: that they wasted so much time.

After she lost her job, she couldn't afford to feed her dogs, so she gave them away.

Bodybuilding is his hobby so he has a very firm tight body with lots of muscle definition.

It's important to take good care of your teeth so you'll be able to eat properly when you get older.

Could you move over a little? "Oh, sorry. I didn't realize I was taking up so much space."

When I speak to a Westerner, I have to shift mental gears, so to speak.

Can you figure out why the boss is so unfriendly this week?

When it comes to my supervisor, he's very inconsistent, so we never get any work done.

Don't get so irritated. Rushing things will cost you more time in the end.