大忙的英文：
busy

参考例句：

It would be a great help to have a vacuum cleaner.
吸尘器可以帮大忙。

That's excellent. It's very helpful. Thanks.
那太好了。帮大忙了。谢谢。

You are very helpful .
您真帮了我的大忙。

She was very helpful in preparing my manuscript.
她在我撰写原稿时帮了大忙。

My anorak has stood me in good stead this winter
我这件皮猴儿今年冬天可帮了大忙了

He was very good to me when I was ill.
我生病时他帮了我的大忙.

The girl reporter obliged Hearst by "fainting" in the main street.
那位女记者在大街上“昏厥过去”，帮了赫斯特一个大忙。

I was only seconded in this research by my son.
在这项研究中，我儿子帮了我的大忙。

It would help me greatly if you would accept D/A or D/P.
如果您能接受D/P或D/A付款,那可帮了我们大忙

The huge turnout that Democrats had yearned for ended up proving instead the power of conservative America.
民主党一直追求的高投票率最终却帮了美国保守派势力的大忙。

busy是什么意思：
adj. 忙碌的；忙于···；人来车往的；占线的；纷繁的
v. 忙着做某事
n. 侦探，包打听

Be engaged in; be Busy in
从事于

to sit for business
因公滞留

As Busy as a bee
(象蜜蜂)忙忙碌碌的

Monkey Business
耍些骗人的把戏、捣鬼

depressed business
不景气的生意