A. | Convinced | B. | Convincing | ||
C. | Being convinced | D. | Having convinced |
分析 確信氣候變化對我們的星球造成了威脅,所有國家都專注于清潔能源的使用.
解答 答案:A
句子有逗號分隔,沒有連詞,要用非謂語動詞;convince與主語all the nations構(gòu)成動賓關(guān)系,要用表示被動的過去分詞,即all the nations are convinced;句意表達的是事實,不是正在發(fā)生的動作,不能用分詞的進行式.故選A.
點評 過去分詞是非謂語動詞的一種,用法很靈活,分為簡單式done(表示與謂語同時或幾乎同時發(fā)生的動作);完成式having been done(表示先于謂語的動作).學(xué)習(xí)時,要把握其用法特征:表示被動和完成.同時還要注意區(qū)分現(xiàn)在分詞和不定式.
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