Did they build the Great Wall at the same time as the Great Canal?
为什么变成被动语态是:
Was the Great Wall built at the same time as the Great Canal?
Europeans didn't invent fireworks.
变成被动语态是:
Fireworks were not invented by Europeans.
为什么这两个句子中都有did,而变成被动语句时,did没了,变为了was和were?
改错题:
1,When the hurricane reached the south coast, it already killed a hundred people.
2.The Chinese used silk hundreds of years before other countries started using it.
3.By the time the hurricane ended,hundreds of trees were blown down.
4.She didn't want to go down the river when she heard that it was badly polluted.
5.When the volcano erupted, he was terrified. He never saw anything like it in his life.
6.There was a terrible earthquake a month before we arrived.
怎么改,为什么?
动词二选一
1。During the sandstorm, we couldn't___
a.breathe B,to breathe
2.The wind during the night was strong enough___trees.
A.knock down B,to knock down
3.I found it intereting____to work in the rain.
a.to be cycling B,to cycle
4.After the flood, there were hundreds of homeless people that needed____
A.to rescue B,to be rescued
5.Mr sun is the only teacher at the school___the United States.
a,visit B,to have visited
选什么,为什么?
变定语从句
They visited an area of the desert. It only rains there once a year.
请详解,望各位多多帮忙,灌水,说风凉话的请绕行。谢谢!