他說與對等連接詞連用後，可以省略後面重複的主詞、助動詞或是動詞。
EX：He looked okay, but tired.
EX 2：He came, but left early.
EX 3：The show was supposed to start early, but didn't.
(順便問一下為什麼例句三後面不是wasn't, 用didn't的主要是什麼文法? 請給些例句。)
這邊還有一句是：I'll never forget one who ever loved me so much but was hurt by me.
想請問這句這樣省略對嗎? 不對又是不對在哪裡?
書上還提到：
but可以和nevertheless連用，表強調。
EX: They were trapped for two days, but nevertheless they survived.
這代表也可以和however連用嗎?
更新1:
1. 想問的是：為什麼動詞是supposed不是was, 照理說 它是當過去分詞...? 2. 還有兩個問題沒被詳答： ＊ I'll never forget one who ever loved me so much but was hurt by me. 想請問這句這樣省略對嗎? ＊ They were trapped for two days, but nevertheless they survived. 這代表也可以和however連用嗎?
更新2:
請詳細回答所有問題