be likely to词性,为啥其后可以加be

be likely to词性,为啥其后可以加be
he is likely to be on his way home句中is likely to充当什么词性，be又是什么词性？

is likely to 是动词词组；句型为 is likely to do sth.
be的词性相当于动词,be动词

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