1、两句的差别是连词两句的差别是连词and。分析句子结构可知，。分析句子结构可知，中中空格处为现在分词作伴随状语；空格处为现在分词作伴随状语；中空格处与中空格处与volunteered并列作谓语。故并列作谓语。故填填donating；填填donated。分析分析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.示例示例两句的差别
2、是连词两句的差别是连词and。分析句子结构可知，。分析句子结构可知，句句为句式为句式“祈使句祈使句and陈述句陈述句”；句为分词短句为分词短语作条件状语。故语作条件状语。故填填Call；填填Calling。分析分析_(call)me tomorrow and Ill let you know the lab result._(call)me tomorrow,Ill let you know the lab result.示例示例两句的差别是连词两句的差别是连词so。分析句子结构可知，。分析句子结构可知，句句为独立主格结构作原因状语；为独立主格结构作原因状语；句句so连接两个并连接两个并列句，
3、空格处所填词应与第二个并列分句的谓语列句，空格处所填词应与第二个并列分句的谓语动词一致。故动词一致。故填填leading；填填led。分分析析The guide _(lead)the way,we had no trouble getting out of the forest.The guide _(lead)the way,so we had no trouble getting out of the forest.示示例例两句的差别是连词两句的差别是连词if。分析句子结构可知，。分析句子结构可知，句句为独立主格结构作条件状语；为独立主格结构作条件状语；句为句为if引导的条引导的条件状语从
4、句。故件状语从句。故填填permitting；填填permits。分析分析The party will be held in the garden,weather _(permit)The party will be held in the garden,if weather _(permit)示例示例三句的差别是逗号后面的部分。分析句子结构可知，三句的差别是逗号后面的部分。分析句子结构可知，句为句为and连接两个并列句，通过时态、语态的分连接两个并列句，通过时态、语态的分析，应用一般过去时的被动语态；析，应用一般过去时的被动语态；句为独立主格句为独立主格结构结构(with复合结构复合结构)；
5、句为现在分词短语作伴随句为现在分词短语作伴随状语。故状语。故填填was fixed；填填fixed；填填fixing。分析分析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.示例示例两句看似结构一致，但仔细分析却是大相径庭。两句看似结构一致，但仔细分析却是大相径庭。句为句为and连接三个并列谓语；连接三个并列谓语；句为句为and连接连接两个伴随状语。故两个伴随状语。故填填sat；填填talking。分析分析He went into the room,_(sit)at the table and began to read newspapers.They walked along the stream together,_(talk)and laughing.示例示例
