中，而 till 不可以放在句首。
eg: Mary did not go to bed until she finished her homework.
玛丽直到做完作业才上床睡觉。
Walk till/until you see a bridge.
一直走到你看到一座桥为止。
教材要点巩固练

一、根据首字母及汉语提示完成句子
1. I want to know about it now from b______（开始）to end.
2. He realized that his acting c______（生涯）was over.
3. It is quite a______（违反）the school rules.
4. He wants to play in a basketball l______（联盟）in the future.
5. She planned to become a professional a______（运动员）.

eginning
; areer
; gainst
; eague
; thlete

6. ______ I do, I do it for you. Do not ever doubt that, my boy.
A. Whatever
B. Wherever
C. Whenever
D. Whoever

A

7. You should turn off the lights ______ you leave the room.
A. until
B. before
C. although
D. so

B

8. Nobody can hear you ______you speak in a louder voice.
A. unless
B. if
C. when
D. after

A