I don't want any ifs and buts; do it at once.

"我想听任何要推延的理由,立刻干吧。"

I don't want ifs and buts; swallow your medicine at once.

我可听你泡蘑菇, 马上吞下你的药。

If you have any requirements, ask me.

如果你有什么要，我提出来。

I doubt if it will rain today.

我能确定今天否会下雨。

If in doubt, call for an ambulance.

如果放心，就打电话叫救护车。

She sat there motionless, as if spellbound.

她坐在那一动动,似乎着了魔。

Woe betide you if you betray us.

如果你背叛我们, 你会得到报应。

The coupon is not valid if detached.

这折扣券撕下即无效。

His playing compels respect, if not enthusiasm.

如果热的话，他的表演就强迫他人予以敬重。

If the police leave, disorder will result.

警察一走，就会大乱。

If you disagree you should speak out.

如果同意, 你就该大声地说出来。

If bend hind irreclaimable, should change new.

如弯曲后能恢复，则应更换新件。

I doubt if anyone slept that night.

我怀疑那天晚上否有人睡过觉。

If you try hard, you will succeed.

如果你努力, 就会成功。

I ate as if there was no tomorrow.

我顾后果地吃。

Holla at me if you love this game!

All the ballas in da world!

As if by magic, his face turned green.

他的脸色一下子变青了。

If you have any objections, just speak out.

如果你有什么反对意见, 就爽快地说出来。

If you’re naughty, mother will spank you.

你要调皮, 妈妈会打你屁股的。

I'll be blowed if it is so.

绝会有这回事。