...(类似的还有determine,如 Determined to leave, he resigned abruptly. 和Determing to leave, he resigned abruptly.)既可以作及物动词,又可以作不及物动词,所以这里用现在分词和过去分词作状语从语法上讲应该都可以,只是意思方面可能侧重点不...
比如:appear to be/to be doing/to have done和appear to do,前面的appear是系动词嘛?apper to do这里是半助动词还是系动词?如何区分半助动词和系动词呢?比如 be going to/be about to do等这些都是助动词,都是接to 的不定式,为什么这些不能接...