改为否定句 1.My brother has dinner.2.My sister brushes her teeth.

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改为否定句1.Mybrotherhasdinner.2.Mysisterbrushesherteeth.改为否定句1.Mybrotherhasdinner.2.Mysisterbrushesherte

改为否定句 1.My brother has dinner.2.My sister brushes her teeth.
改为否定句 1.My brother has dinner.2.My sister brushes her teeth.

改为否定句 1.My brother has dinner.2.My sister brushes her teeth.
1.My brother doesn't have dinner.
2.My sister doesn't brush her teeth.

My brother doesn't have dinner.
My sister doesn't brush her teeth.

my brother does not have dinner
my sister does not brush her teeth

.My brother doesn't have dinner
My sister doesn't brush her teeth.

1.My brother doesn’t have dinner.
2.My sister doesn't brush her teeth
上边有个没换原型的,别选错了。do ,does加动词原形

1.My brother doesn't have dinner.
2.My sister doesn't brush her teeth.
第三人称单数否定要用助动词doesn't 后面跟动词原型