Question

he had a lot of friends ,only a few of___invited to his wedding为什么用them

the villager introduced me to his three kids,one of ___offered to go with me as my guide又为什么用whom

Answer 1

第一句only a few of___invited to his wedding作非谓语动词结构，所以用them。第二句是定语从句，选用关系代词whom。

重点词汇解释

invite　

英 [ɪn'vaɪt]  美 [ɪn'vaɪt] 　 　

vt. 邀请；请求；招致；招待

I've invited the Smiths round for drinks next Friday.

我已邀请史密斯一家下周五来家中小酌。

近义词

ask　

英 [ɑːsk] 美 [æsk] 　 　

v. 询问；请求；邀请；要求；开价；期待

May I ask a question?

我可以问一个问题吗？

Answer 2

你好。
1 因为你的句子是独立主格结构。可以改写成定语从句：
He had a lot of friends ,only a few of WHOM were invited to his wedding
也可以改写成两个简单句：
He had a lot of friends ,BUT only a few of THEM were invited to his wedding .
2 因为你的句子是定语从句，也可以改写成独立主格结构：
The villager introduced me to his three kids,one of them offering to go with me as my guide。也可以改写成两个简单句：
The villager introduced me to his three kids,AND one of them offerED to go with me as my
guide.

Answer 3

第一句：he had a lot of friends ,only a few of them invited to his wedding为什么用them:这句不是定语从句，而是独立主格结构作状语，表示次要动作。意思是：只有几个被邀请参加他的婚礼。（可以改成：and only a few of them were invited to his wedding.)
第二句：定语从句。whom相当于them,当然你也得改成：and one of them offered to go with me as my guide.
如果你第二句直接用them，那就成了两个句子拼凑了，不合英文句子规则。
You are a teacher, I am a student.是不合适的，得加上连词：
You are a teacher, and I am a student.

Answer 4

第一句是并列句，“a few of___”充当句子由ONLY引导的主语，所以用them，构成主语；第二句是复合句，并且是非限制性定语从句，类型的从句需要用which，what，whom等词来引导句子

Answer 5

第一句 only a few of___invited to his wedding 作非谓语动词结构，所以用 them
第二句是定语从句，选用关系代词 whom