A：我們可以使用 however 或 nevertheless (或 nonetheless) 這些副詞來使第二句話與第一句話形成對比，即第二件事情與第一件事情或第二個觀念與第一個觀念形成對比。它們之間的差異僅在於 nevertheless 比 however 更為正式一些且比 however 更具加強語氣的強調作用。例如：
- I can understand everything you say about wanting to go on a trip to Japan with Mike. However, I am totally against it. (我能瞭解你說的有關你想跟麥克一起去日本旅遊的一切事情。然而，我完全反對)
- Martha had been living in Jiangjun Village for over a decade. Nevertheless, the villagers still considered him to be an outsider. (瑪莎已在將軍村居住了超過十年。然而，村民仍視她為外人)
必須注意的是，在引導兩件事情或兩個觀念之間的對比時，however 和 nevertheless 通常放在句子的開頭，但它們亦可位在句中和句末。例如：
- There will be no more pay increases this year. That is for sure. We have, however, agreed to carry out a full review of pay and conditions. (今年將不再有加薪。那是千真萬確的。不過，我們已同意全面檢討薪資和勞動條件)
- There will be no more pay increases this year. That is for sure. We have agreed, nevertheless, to carry out a full review of pay and conditions. (今年將不再有加薪。那是千真萬確的。不過，我們已同意全面檢討薪資和勞動條件)
He’s still able to get around quite well. (他仍然能夠健全地四處走動)
- His whole life has been plagued by illness, however. (但他的一生飽受疾病的折磨)
- His whole life has been plagued by illness, nevertheless. (但他的一生飽受疾病的折磨)
英文中比 however 和 nevertheless 更為非正式的用語則有 even so, in spite of this, yet 或 yet…still。這些替換詞較適合用於口說英語。例如：
- Mary’s really quite ill and has been for some time. Even so / In spite of this she remains in good spirits. (瑪麗真的病得不輕且已生病一段時間。儘管如此，她仍然精神抖擻)
- Allen has over ten million NT dollars in his bank account. Yet he still gets up at six every morning to go to work. (艾倫的銀行帳戶已有逾一千萬台幣的存款。但他仍每天六點就起床工作)
至於 moreover，其意為「並且，而且，再者，此外」，與 however 的意思並不相同。相較於 furthermore 或 in addition，moreover 是個非常正式的字；在這三者當中，最不正式是 in addition。這些副詞係用來證實已提出的論點或對已說過的話補充資料。例如：
- Benjamin is, moreover, a novelist of promise. (此外，班傑明還是個有前途的小說家)
- Bicycling is a good exercise; moreover, it doesn’t pollute the air. (騎腳踏車是很好的運動，而且不會污染空氣)
- Kevin is inefficient, and furthermore he is innocent of any sense of responsibility. (凱文辦事效率低，而且沒有任何責任感)
- In addition, Benjamin is a novelist of promise. (此外，班傑明還是個有前途的小說家)