【正文】
常可以看作是一個(gè)省略句 ,所省略的部分總是“主語(yǔ) +be的變化形式” .省略句的主語(yǔ)必須與主句的主語(yǔ)相同 .eg ? Once (it is )seen, it can never be fotten. ? If (you are )bitten by a snake, you should send for help and don’t walk. 注意 : ? 一致 ,就必須在分詞結(jié)構(gòu)中寫出其邏輯主語(yǔ) .這樣的結(jié)構(gòu)叫做獨(dú)立主格結(jié)構(gòu) .它不是句子 ,只是一個(gè)帶有邏輯主語(yǔ)的分詞短語(yǔ) .eg ? Our house painted white(As our house is/has been painted white),we like it better. ? The job done(When the job had been done),we went home.