本文共 1559 字，大约阅读时间需要 5 分钟。

Word Preparation

enroll in: 加入；参加

to study at a university (college)

I want to be enrolled in a good university.

我想上一所好大学。

Nowadays people are rushing to enroll in special aerobics classes.

现在人们争相报名特殊有氧运动课程。

charge: 收费

to ask someone for a particular amount of money for something you are selling

You will be charged for that sandwich.

那个三明治是收费的。

If you don’t buy a ticket, you might be charged.

如果你没有购票的话，你可能得交费。

annual fee: 年费

money you need to pay yearly for something

He had to pay an annual fee for those newspapers.

他需要支付这些报纸一年的费用。

There will be an annual fee if you want to watch TV.

如果你想看电视的话，得付年费。

pay off: (v.) 偿还债务；还清

to return the money to a bank or someone you borrowed from

I paid off my debts to my friend.

我还清了欠朋友的钱。

I promise you I’ll pay off all my phone bills.

我答应你我会还清我所有的电话账单。

repayment: (n.) 偿还债务；还清

an amount of money that you pay regularly until you do not owe any more.

I need to make an repayment to the bank.

我需要还清银行的债务。

He made a repayment on the money he took.

他还清了他借的钱。

Grammar

if 引导真实条件句

1. if 引导的从句（clause）通常用现在时态表示将来，表示 “如果 … 就 …”，在对话中也可以用 be going to 代替动词的现在时态。例如，
   • We’ll need more chairs if we invite so many people to the party.
   • We’ll need more chairs if we’re going to invite so many people to the party.
2. 表示提供帮助，提出要求或建议，主句用祈使句（imperative sentence）。例如，
   • Take another sandwich if you’re hungry.
3. 表示在这种条件下某事是真实的。例如，
   • The music stops if you press the button.

• If you leave now, you will be able to catch the 7 o’clock train.
• If you have a mobile phone, check if it is turned off.
• The light turns on itself if there is some sound.

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