1.assert “宣稱，堅持”，指不管事實如何，主觀自信地宣稱

We encouraged him to assert his view of the matter.
我們鼓勵他堅持自己對此事的看法。

2.claim “聲稱，主張”，往往表示說話者反對或不同意某一觀點，或指根據某種規定提出的要求或主張

The matter claimed our serious attention.
這件事需要我們認真注意。

3. allege “宣稱，斷定”，指在無真實憑據情況下宣稱

The police alleged that the man was murdered but they have given no proof.
警方聲稱這男子是被謀殺的，但未提出任何證據。

4. answer for 對……負責

I agree but I can't answer for my colleagues.
我同意，但是我不能代表我的同事們。

5. in answer to 作為回答，響應

In answer to my shouts people ran to help.
聽到我的呼叫聲，人們就趕來救我。