past tense 的2種用法?

1 wrong 2 clooect

1) She was crying in the class
- was crying( past continuous tense)

2) She cried in the class
- cried (simple past tense)

(1):
是錯誤的。
was (be) 可後加 -ed / -ing 作為 past tense (passive) / past continuous tense (active)
e.g.
-> I [was frightened] by the noise. （我被那響聲嚇壞了。）
-> I [was playing] in the playground. （我那時正在在遊樂場玩遊戲。）

如果要根據你的第一句來改正，
有 2 個改法，可改為﹕
-> She cried in the class. （即是你的第 2 句，是正確的）
-> She was crying in the class. [past continuous tense (active)]

要記住 be ,do, have 這三個字是 auxiliary verb ，
後可加 verb 的某種特定形態而形成一個 full verb 。
-> I [am taking] to you.
-> I [don't like] eating chicken wings.
-> I [have been] to China.

而 past tense 只是那個字的本身變化，
e.g. go | went | gone | going

如你的題目所問， 'was'(be) 'verb-ed' ，就是 passive voice 的 pattern ﹕
The passive voice is formed by using the correct form of be the past participle of the verb.

1) She was crying in the class.
2) She cried in the class yesterday.(或last。。。）