Translation of "Nevertheless" in Chinese

I am tired; nevertheless, I must finish my homework.

我很累, 然而, 我必須完成我的回家作業。

I was very tired, but I was nevertheless unable to sleep.

我很累，但我还是没办法入睡。

It's just five in the morning, but nevertheless it is light out.

- 只有早上5点，但天已经亮了。
- 才早晨5点，但天已经亮了。

You cannot compare the strength of a man to that of a tiger, but nevertheless, the tiger is still the inferior creature.

虎与人是无法比拼力量的，但是，老虎还是比人类低等。