He does his homework after supper.改为疑问句 和否定句疑问:Does he does his homework after supper?否定:He doesn't his homework after supper.

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Hedoeshishomeworkaftersupper.改为疑问句和否定句疑问:Doeshedoeshishomeworkaftersupper?否定:Hedoesn''thishomeworkaft

He does his homework after supper.改为疑问句 和否定句疑问:Does he does his homework after supper?否定:He doesn't his homework after supper.
He does his homework after supper.改为疑问句 和否定句
疑问:Does he does his homework after supper?
否定:He doesn't his homework after supper.

He does his homework after supper.改为疑问句 和否定句疑问:Does he does his homework after supper?否定:He doesn't his homework after supper.
疑问句不对Does he does his homework after supper?
改成:Does he do his homework after supper?
原因:一般疑问句要把be动词提前,如果文中没有,就用do,does,did
但用do,does,did时,已经把第三人称单数体现,所以,要用动词原形do
否定句不对He doesn't his homework after supper
改成:He doesn't do his homework after supper
原因:doesn't 只是否定所描述的内容,而不是表示所否定的内容,延用修改句中的do
在前面加上否定词doesn't

不对,应该是
疑问:Does he do his homework after supper? does作为助动词,其后面动词为动词原型do
否定:He doesn't do his homework after supper.

does he do his homework after supper?
he doesn't do his homework after supper
do作为动作“做”时也需要助动词