请问如何区分as if/though引导的从句是表语从句,还是方式状语从句?是直接看as if/though前面是系动词

楼主正解.
如果其前是look,seem这类系动词,则为表语从句；
如果不是系动词,则为方式状语从句.
如：It looks as if it's going to rain.表语从句
He told me everything as if I were his best friend.方式状语从句
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