pigs root forward when foraging FORWARD在这里词性是?

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pigsrootforwardwhenforagingFORWARD在这里词性是?pigsrootforwardwhenforagingFORWARD在这里词性是?pigsrootforwardwhe

pigs root forward when foraging FORWARD在这里词性是?
pigs root forward when foraging FORWARD在这里词性是?

pigs root forward when foraging FORWARD在这里词性是?
forward的此处应该当副词了.这句话的意思是猪在觅食时向前拱.root当动词讲有翻寻的意思.在牛津词典中的例句就有pigs rooting for food拱土觅食的猪.forward当副词讲是向前地,此处来修饰动词root.这里还涉及到从属连词引导的从句和主句主语逻辑一致,且从句的形式是主语+be+ing分词时,主语和be动词可省.因此when引导的时间状从原来形式是when pigs are foraging.

动词