undercharge sb for sth
表示少收某人的钱，常用 for 引出收费的项目。
The cashier undercharged me for the coffee.
收银员少收了我的咖啡钱。
充电不足；未充足电；充电不足；对...索价过低；未装足够弹药
to charge someone less than the correct amount
少收钱
To charge less than the correct amount.
充电不足
To put too small a charge into.
一般现在时
The cashier often undercharges customers by mistake.
收银员经常不小心少收顾客的钱。
一般过去时
The store undercharged me for the item yesterday.
昨天那家商店少收了我那件商品的钱。
现在完成时
She has undercharged her clients several times this month.
这个月她已经好几次少收客户的钱了。
规则动词
The cashier undercharged me for the milk, so I pointed out the mistake.
收银员少收了我的牛奶钱，所以我指出了这个错误。
用法提示：undercharged 是 undercharge 的过去式，作动词表示“少收钱”，后接人作宾语。
If the restaurant undercharges you, you should tell the waiter before you leave.
如果餐厅少收了你的钱，你应该在离开前告诉服务员。
用法提示：undercharges 是第三人称单数形式，表达“少收费”的意思。
I think the repair shop undercharged us for the work they did.
我觉得修理店少收了我们的服务费。
用法提示：undercharged 在这里作过去式，说明收费低于应收费用的动作。
表示少收某人的钱，常用 for 引出收费的项目。
The cashier undercharged me for the coffee.
收银员少收了我的咖啡钱。
用 by 引出少收的差额。
The shop undercharged us by five dollars.
商店少收了我们五美元。
被动形式常从顾客一方说明被少收费。
Customers were undercharged because of a pricing error.
由于定价错误，顾客被少收了钱。
此义指充入的电量不足，宾语多为 battery、cell 等。
Repeatedly undercharging a battery can shorten its life.
反复给电池充电不足会缩短其寿命。
grammar · medium
易错句子I undercharged by the cashier.
正确表达I was undercharged by the cashier.
undercharge 是及物动词，表示“向某人少收钱”；主语 I 是少收钱的接受者时要用被动语态 be + 过去分词，即 was undercharged。主动的 undercharged 会表示“我少收了别人的钱”，意思相反。
grammar · medium
易错句子The battery is undercharge.
正确表达The battery is undercharged.
系动词 be 后不能直接跟动词原形 undercharge；表示电池“电量不足、充电不足”的状态，要用过去分词 undercharged 作表语，构成被动或形容词性结构。
grammar · medium
易错句子The waiter undercharged me of five dollars.
正确表达The waiter undercharged me by five dollars.
表示少收的差额用介词 by，构成 undercharge sb by + 金额；不能用 of。of 常用于 accuse sb of 等结构，不适用于 undercharge。
undercharge 指收取的金额低于应收数额（少收），overcharge 指收取的金额超过应收数额（多收），两者方向相反，都用于收费场景，不能互换；用于充电时，overcharge 表示过度充电。
underpay 的对象通常是人，尤其是雇员或劳动者，指给的工资或报酬偏低；undercharge 的对象是顾客，指收取的费用低于应收金额。向顾客要价太少时用 undercharge，不用 underpay。
recharge 强调“再、重新”，指把电重新充满或再次充值；undercharge 强调“不够”，指充电不足或收费低于应收费额。两者都涉及充电，但一个说的是再做一次，一个说的是做得不够。
charge
charge + -er
re- + charge
dis- + charge
sur- + charge
over- + charge
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