一句话里出现两个主谓的时候要用.....?

引导词可以引导一个句子或者是短语。
that where when等都是引导词。
至于说一个句子中出现两个谓语的话分多种情况：
1.有一个动词（其中一个位于吧）做非谓语动词，另外一个做谓语动词。如变成doing格式、to do格式等。
There was a long silence,broken only by his heavy breathing,and by the measured tapping of Sherlock Holmes' finger-tips upon the edge of the table.
句中broken等就是非谓语动词，而was为句子中真正的谓语动词.
I tried to look out of the windows to see something of where we were,but they were made of frosted glass.
tried是谓语动词,而to look out of,to see等不能叫句子中的谓语动词了.
2.引入引导词，将另一个谓语设定到引导词所引导的句子或者短语中，从而以另外一个谓语为主。
A woman appeared with a lamp in her hand,which she held above her head ,pushing her face forward and peering at us.
句中which所引导的句子中就有a woman的动作词,而它却不做谓语.
如果要问常用的连词的话那就多了
and \or\ but\not only……but also\as well as\…………太多了。
至于关系代词和关系副词啊，有点难讲……
不负责任的一句话就是：具体情况具体分析。

是.有....
并列连词:and.or.
从属连词:(忘了)
原因连词:BECOUSE...
.......
你举的那些是引导词
逗号不算