作副詞
①大約,左右.如：There are about 30 students on the playground.操場(chǎng)上大約有30個(gè)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(dòng)向)
People are sitting about on the grass.人們?cè)诓莸氐母魈幾?(強(qiáng)調(diào)位置)
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(duì)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(gè)大城市的書(shū).
固定搭配
①be about to do sth.如：We are about to start.我們即將動(dòng)身.
②what/how about...……怎么樣?(用于詢問(wèn)信息或征求意見(jiàn))如：How about going to Canada for our holidays?咱們?nèi)ゼ幽么蠖燃?好嗎?