一般疑问句里能用现在进行时吗?比如Has he( )his clothes?(wash)

吧
变成一般疑问句是
Has
he
washed
his
clothes如果本来陈述的语句是现在进行时的，He
has
washed
his
clothes?
但是你这题目是has开头，那本来的句子应该是现在完成时，变成一般疑问句是可以的
如
He
is
washing
his
clothes.-------Is
he
washing
his
clothes

一般疑问句的范围很广泛，且不与任何时态冲突啊，两者毫不相干
你说的那个句子应填写 washed
翻译为他洗完衣服了么？这个是现在完成时，表示动作的完成及效果的持续。

如果本来陈述的语句是现在进行时的，变成一般疑问句是可以的
如 He is washing his clothes.-------Is he washing his clothes?

但是你这题目是has开头，那本来的句子应该是现在完成时，He has washed his clothes.吧
变成一般疑问句是 Has he washed his clothes?

Has he washed his clothes?现在完成时
每种时态的句子皆可改成一般现在时

可以啊
Are the students having the English class?