he can what sing(?) --------------------------- (连词成句)

问题描述:

he can what sing(?) --------------------------- (连词成句)

LZ您好,

我认为是
He can sing what ? 他会唱什么?
不过还是觉得很别扭。

What can he sing?
他能唱什么?

What can he sing?他会唱什么?

what can he sing?