I miss him,but he is lucky not to be alive and worrying today.

题目

I miss him,but he is lucky not to be alive and worrying today.
谁能告诉我be在这句中是起助动词的作用吗

答案

to be alive ,首先to的后面一定是动词原形,第二 alive 这里是形容词,所以要用到be!