He wants to know does he often singing He wants to know he often does singing 这两句话哪句对的一、He wants to know does he often singing二、 He wants to know he often does singing 这两句话哪句对的

第一个

都不正确。正确的说法：
He wants to know if/wether he often sings
He wants to know if/wether he often practices singing

两句都不对。
如果你要表达“他想知道他是否经常唱歌。”的意思，应该这样说：
He wants to know if/wether he often sings.

【俊狼猎英】团队为您解答。

貌似两句话都不对啊，我觉得应该是 He wants to know whether he often sings.

两句都有语法问题.
第一句,在从句里,比如定语从句,表语从句和宾语从句等从句中要用正装语序,即陈述句语序,也就是主谓宾的排列.
而第二句,语序倒是用来正装语序,但是does singging 没有这么一说,而singing又是个动名词,不能做谓语,谓语要用动词或者相当于动词的词来充当.
所以,你要表示的正确的句子是 he wants to konw whether/if he often sings.
好了,我就不赘述了,我的回答只是希望给你个启示,