[Since,If]he doesn't come,I won't come[too,either].He asked me[since,if]I would go there with him.

[Since,If]he doesn't come,I won't come[too,either].He asked me[since,if]I would go there with him.
[Since,If]he doesn't come,I won't come[too,either].He asked me[since,if]I would go there with him.

[Since,If]he doesn't come,I won't come[too,either].He asked me[since,if]I would go there with him.
第一个If 第二个either 第三个If
第一个是if引导的条件状语从句
第二个是either做否定句的也
第三个是宾语从句,这里表是否