首先,这是and连接的两个谓语部分在时态和语态上要保持一致；再看前一个句子we must save……（情态动词must）,and后一句话完整的否定句应该是we must not buy……,为了避免重复简洁美观,就成了你看到的这个句子啦
we must save the trees and not buy things made of ivory.中的“
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相关问题
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we must save the trees and not buy things made of ivory
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we must save the trees and not buy things made of ivory意思
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句型：We must save the trees and not buy things made of ivory.
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save ,the,we,trees ,must,ivory,made of,things
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The books are made _____ trees, and we can use trees in many
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We should save water and tree to protect the Earth 对we shoul
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Water is the _____ of all the things we eat and drink. Not m
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英语翻译3.We must not buy the expensive car.4.He must not drive
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we must plant more plants and trees .the birds and animals c
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we must plant more plants and trees .the birds and animals c