AS的用法总结ppt课件
12页1、As 用法小结asas用法归纳用法归纳as词性多,词义广,用法灵活。现将其用法归纳如下:. as 作副词,表示程度,意为“同样地”。在“asas”, “not asas”结构中的第一个as是副词,作“和/与(不)一样”解。e.gJack is as tall as his father. He doesnt speak English as/so fluently as you. As作连词,主要引导以下状语从句:1. 引导时间状语从句。与while意义相近,强调两个动作同时发生;或某事一发生,另一事立刻发生。e.g He shouted aloud as he ran along. I was startled as he opened the door. We get wiser as we get older.2. 引导原因状语从句,与because的用法相近。e.g As it was getting very late, we soon turned back. We must stop writing now, as I have rather a lot of work
2、to do. 3. 引导方式状语从句,作“正如,好象,按照”解。主要的句式有as if(as though);just as;just asas . e.g When at Rome, do as Romans do. We do farm work as the old peasant teaches us. When a pencil is partly in a glass of water, it looks as if it were broken. As(it is)in your country, we grow wheat in the north and rice in the south. 正如(像) 你们国家一样, 。 4. 引导条件状语从句。主要句式有: as long as /so long as 只要 e.g As long as you study hard, you will make great progress.5. 引导让步状语从句;作“虽然,尽管”解。这时从句常用倒状语序,即把从句中的表语,状语或动词原形放在as之前。e.g Child as s
3、he is, she knows a lot. Though she is a child, she knows a lot. Busy as he is, he insists on studying. Though he is busy, he . Try as he might, Tom could not get out of the difficulties. Though he might try, Tom could not get out of the difficulties. As作关系代词1.引导限制性定语从句,用在“such as”, “the same as/the same as”“so/asas”等结构中,e.g He wished to be such a man as Lei Feng was.The teacher gave the students so difficult a problem _ no one could work out.He is not the same man _ he used to be.2. 引导非限制性定语从句,用
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