One good turn deserves another ^{礼尚往来(善有善报)}

turn ^{n.情况的变化（good turn 破天慌了、突然变（good、bad、kind...）了、太意外了）}

• One bad turn deserves another ^恶有恶报
• One kind turn deserves another ^{一次善良的举动值得回报（善有善报）}
• One generous turn deserves another. ^{一次慷慨的举动值得回报}
• One helpful turn deserves another.^{一次有帮助的举动值得回报}
• One thoughtful turn deserves another.^{一次体贴的举动值得回报}
• One considerate turn deserves another.^{一次体贴周到的举动值得回报}

I was having dinner at a restaurant when Tony Steele came in.^{（使用过去进行时表强调）}

当一个事情持续进行，另一件事情打断的时态组合 ^{（过去进行时 + 一般过去 = 两件事同时发生）}

• When my husband was going into the dining room this morning, he dropped some coins on the floor.
• While my friend, George, was reading in bed, two thieves climbed into his kitchen.
• When the plane arrived, some of the detectives were waiting inside the main building while others were waiting on the airfield.

Tony worked in a lawyer's office years ago, but he is now working at a bank ^(now).

(some/several) years ago ^{名词-s,前面省略了 some}

He gets a good salary, but he always borrows money from his friends and never pays it back.

always \ never ^{决定了时态为一般现在(现在、经常性的、习惯性的)}

• The teachers in the New Oriental school can get a good salary. ^{获得不错的薪水}

never ^(从不) = not ^{never前面不需要加助动词}

• I never get up early on Sundays. ^{我从不在星期天早起。}
• I don't get up early on Sundays. ^{我在星期天不早起。}
• I get up late on Sunday. ^{我在星期天起来得晚。}

pay back ^{“偿还（债务等）”，、“付，支付（价款、账单）等”}

• How much did you pay^(vi.) for that dress.
• I paid^(vt.) the bill.

Tony saw me and came and sat at the same table.^{(and 连接三个并列的动词)}

Would you like to join us?^{邀请别人加入}

He has never borrowed money from me. ^{过去完成时([到目前为止]他从未向我借过钱。)}

borrow ^借；借入

• He never borrowed money from me. ^{一般过去时（他[过去]从未向我借过钱。）}
• Can I borrow your pen for a moment? ^{我能借一下你的笔吗？}
• I've arranged that we can borrow their car. ^{我已经说好了，我们可以借用他们的车。}
• It's all right to borrow money occasionally, but don't let it become a habit. ^{偶尔借点钱倒没关系，但不要养成习惯。}

'I have never borrowed any money from you,' Tony said, 'so now you can pay for my dinner!'

pay for ^{为…而付钱}

• I have paid for you a dinner.
• I have paid 20 dollars for the book.
• Must I pay for my cancel? ^{我需要为我的取消付款吗？}