He___feeling well. A:isn't B:doesn't请解释一下原因~

He___feeling well. A:isn't B:doesn't请解释一下原因~
He___feeling well. A:isn't B:doesn't
请解释一下原因~

He___feeling well. A:isn't B:doesn't请解释一下原因~
A:isn't
is 和feeling 构成进行时态,表示现在的感觉：不舒服.
而does 和 feeling 不构成任何正确的语法结构.
也可以说：He doesn't feel well.这样语法正确,但前者的表达方式更地道.

A. isn't
feeling有带ing， 前面要有be动词

A
be + doing

A