1.He does his his homework twice a week.(改为否定句)
问题描述：
1.He does his his homework twice a week.(改为否定句)
He ＿＿ ＿＿his homework twice a week.
2.we don’t have any classes on weekends.(改为同义句）
we ＿＿ ＿＿classes on weekends.说说为什么这样做.
答
doesn't do 前一个does是助动词,后一个才是真正的实义动词,表示做.一般现在是态的陈述句变否定句是要加助动词的,因为主语是三人称单数,加does与 not连写为doesn't .2.have no原句是否定动词,改写的是否定名词