however
01
然而, 不过
used to add a statement that contradicts what was just mentioned
例子
The weather forecast predicted rain; however, the sun is shining brightly.
天气预报预测有雨；然而，太阳正灿烂地照耀着。
He expected the task to be difficult; however, it turned out to be surprisingly straightforward.
他本以为这个任务会很困难；然而，结果却出奇地简单。
02
然而, 不过
used to indicate contrast or contradiction
03
然而, 无论多少
no matter how much or to what extent
例子
However hard she tried, she could n't solve the puzzle.
然而无论她多么努力，她都无法解开这个谜题。
However long it takes, I'll wait for you.
无论需要多长时间，我都会等你。
however
01
无论怎样, 不管用什么方法
in whatever way
例子
However he plans his schedule, he always seems to be running late.
无论他怎么计划他的日程，他似乎总是迟到。
However carefully you follow the instructions, mistakes can still happen.
然而，无论你多么仔细地遵循指示，错误仍然可能发生。
