The has finished his homework yet改错

The has finished his homework yet改错
The has finished his homework yet改错

The has finished his homework yet改错
the该He

the boy has not finished his homework yet

yet-改为already

yet 改为already.
yet只用于否定句：He has not finished his homework yet.

They have finially finished their homework.
如果楼主是说他们没完成的话：
They still did not finish their homework.