i don't konw if my father __(come)will come 还是comes为什么?请帮忙说明理由 宾语从句主句时态和从句保持一致?

i don't konw if my father __(come)will come 还是comes为什么?请帮忙说明理由 宾语从句主句时态和从句保持一致?
i don't konw if my father __(come)
will come 还是comes
为什么?请帮忙说明理由 宾语从句主句时态和从句保持一致?

i don't konw if my father __(come)will come 还是comes为什么?请帮忙说明理由 宾语从句主句时态和从句保持一致?
will come if 在这是 是否 的意思等于whether!
if和whether引导的从句时态遵循规则：
1.当主句是一般现在时,从句可根据需要用任意时态.
The teacher wants to know if/whether the students are studying in the classroom now.
The teacher wants to know if/whether the students have finished their homework.
The teacher wants to know if/whether the students were playing football yesterday afternoon.
2·主句用过去时,从句用过去时态的一种.
He asked whether /if Tom would come to his party.
The mother wondered whether /if his son had finished his homework.
3·主句用过去时,从句是真理时,只用一般现在时
He asked whether /if the earth goes round the sun.
if,whether在宾语从句中的区别
1.介词后的宾语从句只能用whether引导,不能用if引导.
They are talking about whether they will be paid very soon.
2.whether后可以加or not,但是if不可以.
3.在不定式前只能用whether.
He doesn't know whether to help her.

will come
以if引导的从句，主句是一般现在时，从句时一般将来时。

will come

这样理解容易些：
翻译过来，我不知道我的父亲是否会来。（可以看出是对将来动作的一个猜测），因为现实谈话中“父亲”没有来，所以不可能是一般现在时。
注意：一般现在时表示经常发生的事情。