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北师大2003课标版《Lesson 3 Your Money》公开课PPT课件优质课下载
to move used as Object Complement
Ex1 Read these sentences and underline the infinitives and discuss how they are used.
The sand contains materials to keep the natural balance of the area.
… this has destroyed almost all the land, and has forced many local farmers to move to other areas.
to keep used as Attributive
Presentation
3. It is a huge job to control Yellow River
erosion.
4. This helps to develop local economies.
5. So when you have 5 yuan in your
pocket next time, think twice about
how to use the money.
to control used as Subject
to develop used as Object of “help”
how to use used as Object of the phrasal verb “think about”
6. On land with rich soil, local farmers can grow crops to make a living.
7. Visitors from all over the world now come to admire this great achievement.
to make a living used as Adverbial of purpose
to admire used as Adverbial of purpose
动词不定式的基本形式
一般式 to+do
一般被动式 to be done
完成式to have done
完成被动式to have been done
进行式to be doing