问问题描述
答精选答案
它们是be动词的过去式一、作助动词：
1. 现在分词，构成过去进行时态： He was reading.2. 过去分词，构成被动语态：They were defeated.二、作系动词3.现在分词、动名词短语作表语：The film was moving. His job was teaching English .4.过去分词作表语：We were moved.5.不定式作表语：1）有to不定式：His work that day was to clean the blackboard.2)无to 不定式：What he should do is clean the blackboard.
答其他回答（2条）
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dongbeishifandaxue
2026-10-05 23:49:11
Was后面可以加动词的ing形式，也可以加动词的过去分词形式，因为表达不同的意思，Wasdoing是过去进行时态的结构，表达过去某一时刻正在进行的动作，例如I was watching TV, my parents arrive with the whole yesterday afternoon.
be done被动语态，例如The work was finished the day before yesterday，工作是前天被完成的
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beijingwaiguoyudaxue
2026-10-05 23:49:11
was后面可以加以下几种情况：
1 was doing 此时是过去进行时态。例如：He was cooking when I phoned him.我给他打电话时他正做饭。
2 was done 此时是一般过去时的被动语态。例如：The chicken was eaten by Tom.那只鸡被汤姆吃了。
3was to do 表示过去将来时 He was just about to leave when the phone rang. 他正要走，这时电话响了。
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本文概览：它们是be动词的过去式一、作助动词：1. 现在分词，构成过去进行时态： He was reading.2. 过去分词，构成被动语态：They were defeated.二、作系动词3.现在分词、动名词短语作表语：The film was moving. His job was teaching English .4.过去分词作表语：We were moved.5.不定式作表语：1）有to不定式：His work that day was to clean the blackboard.2)无to 不定式