Question

He could never have imagined that he world become famous.(Begin:never...​

Answer 1

Answer:

could have never imagined that" is more so that you couldn't have imagined that in the past, and you "couldn't have" predicted/expected it until now. "I couldn't have imagined that" is basically the same thing. These two sentences are a bit strange and often times native English speakers (especially US natives) throw both around and switch them up, but usually the format of the sentence depends on the topic/context.

Answer 2

Answer:

Never he have imagined that he would become so famous.

Explanation:

Hope this helps