In my hometown, there are two mountains and many roads connected them.

此句有误，还是请把被模仿的句子写出来吧。

【改正】and 之后是一个完整的并列句，为什么要用过去分词或现在分词呢？

1. In my hometown, there are two mountains and many roads connect them.

说明：本句connect 是及物动词，说明道路和两山自身相连接。

2. In my hometown, there are two mountains and many roads connect to them.

说明：本句connect 是不及物动词，也是说明道路和两山自身相连接，但要加介词to。

3. In my hometown, there are two mountains and many roads are connected to them.

说明：本句connect 是及物动词，说明道路和两山被人为的连接。