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before后可接過去分詞嗎　　

有朋友在“答疑中心”問：before后是否可以接過去分詞。問題見：　　

http://www.52ysedu.com/guestbook/Guest_Reply.asp?TopicID=1844 　　

現由本站特約作者龍楠老師回答如下：　　

您的理解是對的，Mr. Smith can buy a small present before invited to a party.這個句子有錯誤，因為before后不能直接跟過去分詞，應改為Mr. Smith can buy a small present before being invited to a party. 關于這一問題，《朗文英語語法》明確指出：在after, before, since等之后不能直接跟過去分詞，而需用“being+過去分詞”。如以下各列均摘自詞典：　　

You can’t eat anything before being operated on. 動手術前你不能吃東西。　　

Watkins hit 16 before being bowled by Ambrose. 沃特金斯擊球得了16分后被安布羅斯投殺出局。　　

The document was edited before being circulated in its final form. 文件在以定稿形式散發之前經過了編輯。　　

Applicants were required to obtain character references before being considered for the work.  申請工作者必須有品行推薦信才予以考慮。　　

The bill would be submitted for public discussion before being enacted as law. 該法案在獲得通過成為法律前，將提請公眾討論。　　

She led for most of the way before being pipped at the post. 她在大部份賽程中都一直領先，但是在終點被超過。　　

The product had not been adequately tested before being put on the market. 這種產品在投放市場前沒有進行充分的檢驗。　　

They stay here a few hours before being sent to refugee camps, which are now almost full.  他們在這兒呆了幾個小時后被送往難民營，而那里現在幾乎已經滿員了。　　

It is normal to spend two or three years working in this country before being posted overseas.  被派往海外之前，通常會在這個國家工作兩三年。