高中英语语法学习 替代动词
1.do/does/did替代动词
If thats the case then 100,000,000,000,000,000,000,000 people would weigh as much as the whole Earth
does.(= weighs)
Difficulties strengthen the mind, as labour does(= strengthen) the body.劳动锻炼身体，困难锻炼意志。
A feather falls slower than a stone only because the air holds the feather back more than it does the stone.(替代)
2.so和not分别代替肯定和否定的从句(常用动词：think,believe,suppose,imagine,expect,guess,be afraid,fear,hope.etc.)
Is he coming?
I suppose so./So I suppose.
否定：I suppose not.
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