1. 什么是不定式?
To complete the program needs much effort.
完成这项计划需要很大的努力。
They have three tickets to spare.
他们多出三张票。
I find it interesting to stay with you.
我发觉与你待在一起很有趣。
My job is to teach English.
我的工作就是教英语。
2. 不定式的语法功能
Is it necessary to bring an umbrella today?
今天有必要带雨伞吗？
He agrees to go with us.
他同意跟我们一起去。
Liu Ying was the very girl to meet you.
刘英正是来见你的那个女孩子。
He goes there to enjoy the fresh air.
他去那儿享受新鲜空气。
3. 不定式的否定
Take care not to break it.
小心别把它打破了。
He strongly advised me not to do so.
他强烈建议我别这样做。
He asked me not to make so many mistakes.
他要求我不要出那么多错误。
The police warned us not to go out at night.
警察告诫我们夜间不要出门。
4. 疑问词+不定式
He asked me how to open the box.
他问我这盒子怎么打开。
You have to consider what to do next.
你必须考虑下一步怎么办。
How did you know where to find me?
你怎么知道在哪里可以找到我？
You'll learn when to use that construction.
你会知道什么时候使用这种结构。