He Learns English from Bob(否定句、一般疑问句、特殊疑问句、反意疑问句)

正确答案应该是：
否定句
He doesn't learn English from Bob.
一般疑问句：
Does he learn English from Bob?
特殊疑问句：
Who does he learn English from?
What does he learn from Bob?
Who learns English from Bob?
反间疑问句：
He learns English from Bob,Doesn't he?