倒裝句是指將主語和謂語的位置顛倒過來的句子結構。在英語中，倒裝句通常用於表達強調或產生壹種修辭效果。下面是however在倒裝句中的用法：
1、however+主語+動詞，作為副詞。這種結構表示壹種轉折關系。例如：
- However cold it is outside, I’ll still go for a run.（不管外面多冷，我仍會去跑步。）
- However much he studies, he never gets good grades.（不管他學習多少，他從來沒得過好成績。）
2、主語+動詞+however，作為連詞。這種結構也表示轉折關系，但語氣比較弱。例如：
- I’ll still go for a run, however cold it is outside.（不管外面多麽冷，我仍會去跑步。）
- He never gets good grades, however much he studies.（不管他學習多少，他從來沒得過好成績。）
因此，使用however倒裝句時，需要在主語和謂語的位置之間加上however，並註意順序和語態的變化。
“However”常見用法：
1、表示讓步關系
當前後兩個句子之間存在壹點矛盾時，可以用however表示讓步關系。例如：
- I tried my best. However, I still failed the test.
- We have done everything we could. However, the result was not as good as we expected.
2、表示轉折關系
當前後兩個句子之間存在壹個明顯的轉折時，可以用however表示轉折關系。例如：
- She can be very kind. However, she can also be very tough when it's needed.
- The children love playing on their phones. However, they still enjoy outdoor activities too.
3、表示對比關系
當兩個句子之間存在明顯的對比時，可以使用however表示對比關系。例如：
- The company's profit has been increasing every year. However, the CEO's salary has not been adjusted all along.
- The hotel room was quite expensive. However, it was very dirty.
4、表示強調關系
有時候，為了強調某壹點，可以使用however表示強調關系。例如：
- The weather is very nice. However, we still have to finish our work.
- You may be the boss. However, that does not mean you are always right.
總之，“however”可以讓妳的語言更加生動、準確、豐富。但需要註意的是，它更多是用於正式、嚴肅、商務場合。在口語、日常生活交流等場合中，不需要總去使用這個詞。