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iwritemyownoriginalsentencesusingthegrammariwaslearning.use为什么用ing

题目详情
i write my own original sentences
using the grammar i was learning .use 为什么用ing
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答案和解析
using the grammar i was learning 是方式状语,修饰谓语write,作方式状语的要用分词,或者在分词前前面加by