这里为什么使用动名词下面各题（66题除外）的开头为什么要用动名词,不是祈使句吗,祈使句的开头不是要用原形吗?另外,为什么66题的开头又没有和其他各题一样用动名词,而是用的动词原形r

Question

这里为什么使用动名词
下面各题（66题除外）的开头为什么要用动名词,不是祈使句吗,祈使句的开头不是要用原形吗?另外,为什么66题的开头又没有和其他各题一样用动名词,而是用的动词原形rewite呢?
Rewrite the following sentences as required:
61.Turning the following sentence into the tag question form:
You wee hardly twelve then.
62.Turning the following statement into a YES-NO question:
I don't think he will win the match.
63.Turning the singular nouns or noun phrases into plural forms wherever possible with other necessary changes:
He had to go to his sister's for dinner.
64.Using passive voice:
Mary realized that they were making fun of her.
...
66.Rewrite the following sentence as required (Using as...as):
John spends one hour watching TV after supper and spends one hour writing.
...

Answer 1

祈使句是不能用动名词（v+ing)形式开头的
这里rewrite开头是祈使句,后面用到的v+ing是对这个祈使句的补充说明,即为动名词短语
“Rewrite the following sentences as required”按照要求改写以下句子,而这里没有提出要求（名词）,所以以下用动名词短语形式作为对"要求"的描述