句子开头第一个字母要大写
即
These are potatoes.
这些是土豆。
主系表结构
主语是复数,be 动词用are
potato的复数是 potatoes
句子These are potatoes.(这些是土豆)没有错误哦。当然,these的用于句首第一个字母t要大写。
结构2:名词或代词(主格) + doing
1)My mother cooking in the kitchen, I was doing my homework in my room. (表伴随)我妈妈正在厨房做饭,我在房间里做作业。
错误在于第一个字母没有大写。
These are potatoes.
没有问题啊,复数用are