1、Protect the Earth Read and answer 1.Why the water is useful? 2.How should we save energy? 3.What can trees help us to do? 4.What we use plastic to do? How to protect the Earth? We should save water We should save energy How to protect the Earth? We should not cut too many trees We should not use pla
2、stic bags Grammar time 1. should 的用法的用法 we should/shouldnt do 2. use 的用法的用法 useto NotesNotes 情态动词情态动词 should should 在本课中表示在本课中表示 “应该,必须应该,必须”,”, 用于表示用于表示忠告、建议忠告、建议等。等。 例如:例如: You should drink some hot tea with honey. 你你应该应该喝些蜂蜜茶。喝些蜂蜜茶。 She is tired. She should go to bed early. 她累了,她她累了,她应该应该早点睡觉。早点睡
3、觉。 NotesNotes 情态动词情态动词 should 的用法的用法 与情态动词与情态动词 can 一样,一样,should 的否定形的否定形 式式为为should + not或或shouldnt;在;在疑问句疑问句 中中, should 放在主语前放在主语前,should 没有人没有人 称和数的变化称和数的变化。例如:。例如: You should drink water. You should not = (shouldnt) drink water. Should you drink water? Yes, you should./No, you shouldnt. We use w
4、ater to wash clothes. We use water to wash fruits. We use woods to build a house. We use plastic to make a bottle. We use computers to surf the Internet. 1. 情态动词情态动词 should 的用法的用法 与情态动词与情态动词 can 一样,一样,should 的否定形的否定形 式为式为should + not或或shouldnt;在疑问句;在疑问句 中,中, should 放在主语前,放在主语前,should 没有人没有人 称和数的变化。称和数的变化。 2. useto表示用表示用做做