表示转折关系的连词基本用法和特别用法
表示转折关系的连词有，but, however, while, yet，still等。
1）but但是
He is old, but he is healthy.他虽然年纪大，但是很健康。
2）however然而，但是
可放在句首、句中或句末，通常用逗号隔开，作为插入语。
My room is small, however, it’s very comfortable.我的房间很小，但是很舒适。
3）while然而，而
I am good at swimming while my daughter is good at dancing.我擅长游泳，而我女儿擅长跳舞。
4）yet然而，可是
He studied hard, yet he fail the exam.他学习很努力，可是没考及格。
4.表示因果关系的连词有，so, therefore, for等。
1）so因此，所以（不能与because连用）
It was late, so I went home.天色晚了，所以我就回家了。
2）therefore因此，所以（比so正式，常与and连用）It rained and therefore the football match was postponed.
下雨了，所以足球赛推迟了。
3）for因为
He is not at school today, for he has a bad cold.他今天没上学，因为他得了重感冒。
题1： He hurried to the booking office, only _______ that all the tickets had been sold out.
A. to tell B. to be told C. telling D. told
题2： The teacher came into the classroom, only_______ of the students in it.
A. to find none B. finding no one C. to find no one D. finding some
题3： ______in the leg made it impossible for me to walk as fast as usual.
A. Being injured B. To be injured C. Having injured D. Injured
题4： The silence of the library is sometimes broken by a sudden cough or the sound of pages______.
A. turning B. turned C. being turned D. having turned
题5： _______at my classmates' faces, I read the same excitement in their eyes.
A. Looking B. Look C. To look D. Looked
题6： _______ their hats into the air，the fans of the winning team let out loud shouts of victory.
A. To throw B. Thrown C. Throwing D. Being thrown
题7： _______ that she was going off to sleep, I asked if she’d like that little doll on her bed.
A. Seeing B. To see C. See D. Seen
题8： _______to the right，you will find the house you are looking for. You cannot miss it.
A. Turned B. Turn C. To be turning D. Turning
题9： The flowers his friend gave him will die unless every day.
A. water B. watering C. watered D. to water
题10： When again, the suspect(嫌疑人) had to admit that he had kidnapped a child and sold him.
A. question B. questioned C. questioning D. to question
