即使天下大雨我上学也不能迟到

I can't be late for school even if/though it rains cat and dog.

I never late for school although it rains hard.

i can't be late for school even if it rains heavily.

I cannot be late for class even through it is raining hard.
怎么没有悬赏分啊……

I can't be late even though it's raining.

We can't be late for school even if it rained heavily outside.