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:orHe likes dolphins, he thinks it's not ugly( )foolish

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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't do his homework at home【这也对吗?我们老师说着才对。】

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.

对的。
c:or

也对。但是改否定,用often不太合习惯,改成He doesn't usually do his homework at home好
选C,因为ugly和foolish都是贬义词,因此不用but;本句是否定句,用or不用and

or
用于疑问和否定句中