Q:He often does his homework at home{改成否定句} A:He doesn't often do his homework at home
问题描述：
Q:He often does his homework at home{改成否定句} A:He doesn't often do his homework at home
请高手验证对吗.
还有：He likes dolphins, he thinks it's ont ugly()foolish.
A:and B:but c:or
He likes dolphins, he thinks it's not ugly()foolish.{上面的题目错了。}
答案请说明原因
He often doesn'tdo his homework at home【这也对吗？我们老师说着才对。】
答
He seldom does his homewok at home.原句的意思是说他经常在家写作业,因此改为否定句应该是他很少（不经常）在家写作业.He often doesn't do his homework at home,这个句子不通顺.
C :意思是说他喜欢海豚,他认为他既不丑也不蠢.