My friend Max started to play football ______ he was seven years old.
A.sinceB.whenC.ifD.while
B

試題分析:since由于,自從……以來;when考慮到,當……時;if 是否,如果;while然而,當……時。句意:在他七歲的時候,我的朋友馬克思就開始踢足球了。While引導時間狀語從句強調(diào)主從動作的同時發(fā)生,從句多用進行時態(tài),結(jié)合語境可知選B。
點評:連詞在句子中主要起聯(lián)系上下文的作用,他們之間的區(qū)別就是表示邏輯關(guān)系的不同,所以在解題時先要理解上下文含義,然后根據(jù)上下文邏輯關(guān)系選擇合適的連詞。連詞的用法都比較多,語義之間還有交叉,熟記其基本應用規(guī)則,了解其區(qū)別,注意固定搭配對象,是做好此類題型的關(guān)鍵。
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