是一般過去時。was加過去分詞時一般過去時的被動語態。被動語態指主語和謂語的關係是被動；或者主語是謂語動作的承受者。被動語態的結構：be+done，這裡的動詞就是過去分詞。語態說明了主語和謂語的關係，任何一個句子都有時態的使用。所以不同時間，不同關係，使用的被動語態形式也不同。
擴展資料。
使用被動語態應注意：
1、不及物動詞無被動語態。
what will happen in 100 years
the dinosaurs disappeared about 65 million years ago
2、有些動詞用主動形式表示被動意義。
this pen writes well
this new book sells well
3、感官動詞或使役動詞使用省略to的動詞不定式，主動語態中不帶to，但變為被動語態時，須加上to
例：make somebody do something→somebody+ be +made to do something
see somebody do something→somebody +be +seen to do something
a girl saw my wallet drop when she passed by.→my wallet was seen to drop by a girl when she passed by
the boss made the little boy do heavy work.→the little boy was made to do heavy work by the boss
擴展資料。
使用被動語態應注意：
1、不及物動詞無被動語態。
what will happen in 100 years
the dinosaurs disappeared about 65 million years ago
2、有些動詞用主動形式表示被動意義。
this pen writes well
this new book sells well
3、感官動詞或使役動詞使用省略to的動詞不定式，主動語態中不帶to，但變為被動語態時，須加上to
例：make somebody do something→somebody+ be +made to do something
see somebody do something→somebody +be +seen to do something
a girl saw my wallet drop when she passed by.→my wallet was seen to drop by a girl when she passed by
the boss made the little boy do heavy work.→the little boy was made to do heavy work by the boss