如题，希望每个词还有关于其用法的例句。
谢谢！

deduct

vt.
扣除, 减除

追溯; (演绎地)推论

deduct the tax from the paycheck
从薪金中扣除税款
例句
To deduct from an amount; subtract.
减去，减掉从一数量中抽出；减掉

To deduct or subtract from a cost or price.
减少从费用或价格中扣除或减去

To deduct(withholding tax) from an employee's salary.
扣留从雇员收入中扣除（代扣的所得税）

To deduct or return(an amount) from a payment or bill.
打折从支付的钱款中或从帐单上减去或退还（一部分数量）

To withhold or deduct a part from(one's salary or wages).
扣除以某人（月工资或周薪中）扣掉一部

2、knock off
v.
敲掉, 击倒, <口>(从价格、帐单等中)减去，除去

例句
Knock it off!
住嘴！(或别笑了，等)

Knock off an opponent
排除反对者

Knock off every objection
排除一切反对意见

Knock off routing duties
匆匆处理日常事务

Knock off a few lines
匆匆写几句

3、
subtract:减去
例句
To take away; subtract.
拿走；减去

To deduct from an amount; subtract.
减去，减掉从一数量中抽出；减掉

I subtract 3X from 7X and got 4X.
我把7x减3x，剩下4x。

Then you subtract ten years from that estimation.
然后，从你的估计上减去10岁。

If you subtract two from five you get three.
五减去二剩下三。

4、take away
v.
取走

例句
Take away
减去

Take away, please.
带走。

Take these basketball away.
把这些球拿走。

27 take away 3 leaves 24.
27减去3等于24。

Don't take it away!
别拿走它