1. 表示“結(jié)束”，可用作及物或不及物動詞，表示以某種方式結(jié)束通常用介詞 with, by 等。如：

      He has concluded his research. 他已完成了他的研究工作。

      He concluded his talk with a funny story. 他以一個有趣的故事結(jié)束講話。

      He concluded by giving us some advice. 他結(jié)束時給我們提了些建議。

      2. 表示“斷定”或“推出”，是及物動詞，但通常只接 that 從句或不定式的復(fù)合結(jié)構(gòu)（且不定式只能是 to be型）作賓語，通常不接簡單賓語，也不用于進行時態(tài)。如：

      我們斷定是他錯了。

      正：We concluded that he was wrong.

      正：We concluded him to be wrong.

      我斷定他一定是出事了。

      正：I concluded that he must have met with an accident.

      誤：I concluded him to have met with an accident.

      3. 表示“決定”，其后通常接不定式或 that 從句。如：

      We concluded to wait for fair weather. /We concluded that

      We would wait for fair weather. 我們決定等待好天氣。

      4. 期刊雜志等在連載文章時，表示“待續(xù)”用 to be continued, 表示“下期續(xù)完”用 to be concluded, 表示“全部載完”則通常用 concluded。