摘要:连接代词+动词不定式 动词不定式前有时加上连接代词what, which或连接副词when, where, why, how等.构成动词不定式短语.在句中作主语.宾语.表语等成份. When to start has not been decided. I did not know what to do. He gave me some advice on how to learn.

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