Question

[English Question]几个简单的关于合成句子的问题 希望有满意的答案,可以追分

1.These are the things.
I bought them yesterday.
关键要指导的地方:不知道这里是否用which,which的意思是"哪一个",这里明显是复数

2.I am the person.
I wrote to you.
关键要指导的地方:这里的连接代词是用主格还是宾格?

3.They are the people.
I saw them yesterday.
关键要指导的地方:是用whom吗?这里有没有单复数之分,whom可以既用于单数又用于复数吗?who呢?可以单复都用它吗?

4.They are the trees.
We cut them down yesterday.
关键要指导的地方:和1一样,这里给出标准答案就行了

因为平时的练习不够,有时困扰在简单的题上,希望知道的写详细点.
这里先谢个了~分不高,莫见怪了啊

Answer 1

these are the things which i bought yesterday
I am the person who wrote to you.
They are the people whom i saw yesterday
they are the trees which we cut down yesterday

第一个用WHICH,这里不是复数的问题,这里是一个关系代词
第2题用主格,在第2句中做主语嘛
3,就是宾格了,主要看~~第2小句中做什么成分
WHO WHOM都是既用于单数又用于复数