四十的英文：
forty
40

Among this money there was one forty-sou piece
里面有一个值四十苏的钱。

Younger/older than forty,fifty,etc years of age
不足[已过]四十、五十岁等.

Mr. Smith is still in his forties.
史密斯先生才四十几岁

a steamer of 40 feet beam
船幅四十呎之轮船

"Exclusive of the driver, there are 40 persons in the bus."
"除了司机,公车上一共有四十个人。"

His painting became mature in his 40s and he emerged as a famous painter of the period.
他在四十多岁，就艺术成熟，名声大噪。

Every man at forty is a fool or a physician
人到四十,如果不是傻子,就该知道保养身体

An atmosphere of relaxation prevails in the Taiwan Straits for the first time in the past four decades.
台湾海峡出现了四十余年来前所未有的缓和气氛。

He was a man of forty, thin, with a pinched face, precise and rather pedantic
他年已四十，瘦骨嶙峋，一张干瘦的脸，刻板而迂腐。

Confucius said: "At fifteen my heart was set on learning; at thirty I stood firm; at forty I had no more doubts
子曰:「吾十有五而志于学,三十而立,四十而不惑

The atlas contains forty maps.
这个地图集有四十幅地图。

He had forty sons.
他有四十个儿子。

Every man at forty is a fool or a physician
人到四十,如果不是傻子,就该知道保养身体

He talked forty to the dozen at the meeting．
他在会上滔滔不绝地讲话。

Give yourself forty minutes at the outside.
最多给自己留40分钟。