(1)I help him and he helps me. 我帮助他，他帮助我。
→The old man wants a room that is small but comfortable. (简单句转换为复合句)
(3)I lent my bicycle to John, who lent it to George. 我把我的自行车借给了约翰，他又把它借给了乔治。
→I lent my bicycle to John and he lent it to George.(复合句转换为并列句)
(4)He succeeded through hard work. 他靠勤奋工作取得了成功。(简单句)
(5)He worked hard and so he succeeded. 他勤奋工作，所以他取得了成功。(并列句)
(6)He succeeded because he worked hard. 他成功是因为他勤奋工作。(复合句)
①You need not put your foot in it. 你不必自找麻烦。
→It is necessary for you to put your foot in it.
②What have you got in your pocket? 你口袋里是什么?
→What’s there in your pocket?
③It will rain next week. 下星期要下雨。
→There will be rain next week.
(7)He came too late to see the first part of the show. 他来得太晚了，没赶上节目的第一一部分。
→He came late, so he missed the first part of the show.
(8)Sleeping but little and thinking much, I find nights long. 我入不了睡，思绪万千，故觉得夜很长。
→I find nights long, for I sleep but little and think much.
(9)Tom wants to buy a bicycle, so he’s saving up. 汤姆要买一辆自行车，为此他正在攒钱。
→Tom is saving up for a bicycle.
(10)She was young and beautiful, and yet I did not love her. 她年轻貌美，但我却不爱她。
→I did not love her, with all her young and beauty.
(11)The meeting over, we all went home. 散会后，我们就都回家了。
→When the meeting was over, we all went home.
(12)To my knowledge, they never lost a package from the Unite States. 据我所知，他们从未丢失过一件从美国寄来的包裹。
→As far as I knew, they never lost a package from the Unite States.
(13)He went all the same although it was raining. 尽管下雨他还是走了。
→He went all the same in spite of the rain.
(14)If you make your own clothes, it will save you money. 自己做衣服，你就会省钱。
→You will save money by making your own clothes.
(15)Try again and you will succeed. 再努力一次，你就会成功。
→If you try again, you will succeed.
(16)I’ve been away only for three years, yet I can hardly recognize my hometown. 我仅在外三年，可我几乎辨认不出我的故乡了。
→Although I’ve been away only for three years, I can hardly recognize my hometown.
(17)As Jane was the eldest, she looked after the others. 珍妮是大姐，所以她照顾其他弟妹。
→Jane was the eldest, and so she looked after the others.
(18)If milk is not kept in a cool place, it will go sour. 牛奶如不存放在阴凉处，很快就会变坏的。
→Milk must be kept in a cool place, or else it will go sour.
(19)The bird was a cock. The fox was looking at it hungrily. 那是一只公鸡。狐狸正以贪婪的目光看着它。
→The bird which the fox was looking at hungrily was a cock.
(20)It was a snowy day. A small girl was making her way down the street. She was holding a box of matches in her hand. 一个下雪天，一个小女孩在街上走着。她手上拿着一盒火柴。
→It was a snowy day and a small girl was making her way down the street, holding a box of matches in her hand.
(21)My ruler has a scale marked in centimeters. 我有一把标有厘米的尺子。
→I’ve got a ruler. It has a scale. The scale is marked in centimeters.
(22)Instead of hating him, I like him all the more for it. 我不但不恨他，相反为此更爱他。
→I don’t hate him. On the contrary, I like him all the more for it.