Question

They were sick,too.的否定句是什么？

Answer 1

They were sick too.

too之前不需要逗号的。

这表示他们也生病了。

否定句是直接加否定词。

They were not sick.

他们没有生病。

Answer 2

应该是They were not sick，either.他们也没有生病。原句是含有be动词的肯定句，改为否定句直接在be动词后加not，但是需要注意，too表示也，只放在肯定句中，用于否定句中表示也用either.

Answer 3

They were sick,too.的否定句是They were not sick, either. 这里的too要改为否定形式either.

Answer 4

They were sick, too.
他们也没有生病。
句子中有系动词 were,所以变否定句时，直接在were后面加 not就行了，不过，还得注意：
too 用于肯定句末尾，either 用于否定句末尾，所以这个句子的否定句就是
They were not sick, either.
他们也没有生病。

Answer 5

they were sick,too的否定句是they were not sick.