1、,两句的差别是连词and。分析句子结构可知，中空格处为现在分词作伴随状语；中空格处与volunteered并列作谓语。故填donating；填donated。,分析,He volunteered to help control traffic, _ (donate) an hour of his time every week. He volunteered to help control traffic, and _ (donate) an hour of his time every week.,示例,两句的差别是连词and。分析句子结构可知，句为句式“祈使句and陈述句”；句为分词短语作
2、条件状语。故填Call；填Calling。,分析,_ (call) me tomorrow and Ill let you know the lab result. _ (call) me tomorrow, Ill let you know the lab result.,示例,两句的差别是连词so。分析句子结构可知，句为独立主格结构作原因状语；句so连接两个并列句，空格处所填词应与第二个并列分句的谓语动词一致。故填leading；填led。,分析,The guide _ (lead) the way, we had no trouble getting out of the forest.
3、 The guide _ (lead) the way, so we had no trouble getting out of the forest.,示例,两句的差别是连词if。分析句子结构可知，句为独立主格结构作条件状语；句为if引导的条件状语从句。故填permitting；填permits。,分析,The party will be held in the garden, weather _ (permit) The party will be held in the garden, if weather _ (permit),示例,三句的差别是逗号后面的部分。分析句子结构可知，句为a
4、nd连接两个并列句，通过时态、语态的分析，应用一般过去时的被动语态；句为独立主格结构(with复合结构)；句为现在分词短语作伴随状语。故填was fixed；填fixed；填fixing。,分析,Jim was listening attentively to the lecture, and all his attention _ (fix) on it. Jim was listening attentively to the lecture, (with) all his attention _ (fix) on it. Jim was listening attentively to the lecture, _ (fix) all his attention on it.,示例,两句看似结构一致，但仔细分析却是大相径庭。句为and连接三个并列谓语；句为and连接两个伴随状语。故填sat；填talking。,分析,He went into the room, _ (sit) at the table and began to read newspapers. They walked along the stream together, _ (talk) and laughing.,示例,
