而不是的英文：
in lieu of
in stead of
instead of
other than
rather than

参考例句：

Clinton isn't a grudge holder.
克林顿不是一个爱记仇的人。

With reason;with logic
不是无理

I am not an obsessive. Not at all.
我不是个强迫症患者，完全不是。

She is a career woman rather than a housewife.
她是职业妇女而不是家庭主妇。

It is not something ephemeral.
它不是朝生暮死的东西。

It's a cat, not a dog.
这是猫，不是狗。

No, they aren't. They are drivers.
不，不是。他们是司机。

Not any more; not any longer
不再;现在已经不是

This is no jesting matter.
这实在不是闹着玩儿的

The tumour is not malignant
这个瘤不是恶性的。

lieu是什么意思：
n. 代替；（以…）替代

This can be in lieu of having to buy a humidifier and leaving it running.
这样可以代替不必买个加湿器而且让它不停地开着。

She took his hand in lieu of a reply.
她拉他手代替回答。

He used an inked thumbprint in lieu of signature.
他用按手印替代签字。

stead是什么意思：
n. 代替；用处
v. 对…有利

I beg you to act in his stead.
我想请你代替他。

I thought you take part in the meeting stead of me.
我想要你代替我去参加那个会议。

He asked me to come in his stead.
他让我替他来。

instead是什么意思：
adv. 代替；反而

They fled instead of making a stand.
他们逃跑而不进行抵抗。

The roof was slated instead of thatched.
那个屋顶不是用草而是用石板盖的。

Instead there was another fudge.
取而代之的是另外一种谎言。