We saw quite a lot of cows on the farm.( 改为一般疑问句）（）（）（）quite a lot of cows on the farm.They worked in a hospital last year(改为否定句）（）（）（）in a hospital last year

Did you see quite a lot of cows on the farm?
They didn't work in a hospital last year.

1,Did we see ;2,they didn't work,

为你解答。
We saw quite a lot of cows on the farm.( 改为一般疑问句）
（Did）（you）（see）quite a lot of cows on the farm？
They worked in a hospital last year(改为否定句）
（They）（didn't）（work）in a hospital last year.

We saw quite a lot of cows on the farm.( 改为一般疑问句）
（Did ）（you ）（see）quite a lot of cows on the farm?
They worked in a hospital last year(改为否定句）
（They ）（didn't ）（work ）in a hospital last year
加油！不明白再问！如果帮到你，请采纳，谢谢！

Did you see quite a lot of cows on the farm?They didn't work in a hospital last year.【解析】：一般过去式的陈述句,改疑问句主要看动词.如果动词是实意动词,改疑问句就是Did+主语+动词原形+...(即剩下的照抄）...

（Did）（you）（see）quite a lot of cows on the farm.
（They）（didn/t）（work）in a hospital last year