1、作副詞
①大約,左右.如:There are about 30 students on the playground.操場上大約有30個學(xué)生.
②將要,將近.如:I’m about ready.我快準(zhǔn)備好了.
③到處,各處.如:The children are running about.孩子們到處亂跑.(表示動向)People are sitting about on the grass.人們在草地的各處坐著.(強(qiáng)調(diào)位置)
2、作介詞
①在……到處;在……各處.如:He is walking about the town.他在城鎮(zhèn)到處走.
②關(guān)于;對于;有關(guān).如:I am going to read a book about that big city.我要讀一本關(guān)于那個大城市的書.
3、固定搭配
①be about to do sth.如:We are about to start.我們即將動身.
②what/how about...……怎么樣?(用于詢問信息或征求意見)如:How about going to Canada for our holidays?咱們?nèi)ゼ幽么蠖燃?好嗎?