1,表示說話時(shí)正在進(jìn)行或發(fā)生的動(dòng)作。
  Please don't make so much noise. I'm writing a composition. 不要吵鬧。我正在寫作文。
? ? ? Let's set off. It isn’t raining now. 咱們出發(fā)吧。現(xiàn)在不下雨了。
  這類情況常與now現(xiàn)在,at the present現(xiàn)在,at the moment現(xiàn)在,today今天,this week這個(gè)星期,this year今年等時(shí)間狀語(yǔ)連用。有時(shí)通過上下文可以判斷出應(yīng)采用何種時(shí)態(tài), ? ?如:
? ? ? It's four o'clock in the afternoon. The children are playing football on the sports ground. 現(xiàn)在是下午四點(diǎn)。孩子們?cè)诓賵?chǎng)上踢足球。
  Hurry up! We are all waiting for you. 快點(diǎn)!我們大家都等著你。
  Look! They are reading over there under the tree. 看!他們?cè)谀沁叺臉涞紫驴磿?Listen! She is singing in the room. 聽!她在房間里唱歌。
  Where is Kate? She is reading in the room. 凱特在哪里?她在房間里看書。 Why are you crying? Is something wrong? 為什么哭呢?有什么不對(duì)?
2,表示現(xiàn)階段正在進(jìn)行而說話時(shí)不一定在進(jìn)行的動(dòng)作。
  We are working in a factory these days. 這幾天我們?cè)谝患夜S工作。 They are compiling a dictionary. 他們?cè)诰幰槐驹~典。
  這類情況常與today今天,this week這個(gè)星期,this evening今天晚上,these days現(xiàn)在、目前等時(shí)間狀語(yǔ)連用。
3,在口語(yǔ)中表示主語(yǔ)計(jì)劃將要作的動(dòng)作。
  They are leaving for New York tomorrow. 明天他們將要?jiǎng)由砬巴~約。 Is your brother departing soon? 你的兄弟很快就要啟程嗎?
  這類情況常與come來,go去, leave離開,depart離開,arrive到達(dá),stay逗留,start開始等動(dòng)詞連用。所用的動(dòng)詞必須是動(dòng)作而不是狀態(tài),主語(yǔ)必須是人。
4,現(xiàn)在進(jìn)行時(shí)與always等副詞連用時(shí)帶有感情色彩。
  He's always quarrelling with others. 他老喜歡跟別人吵架。
  She is constantly worrying about her son's health. 她不停地為她兒子的健康擔(dān)心著。 The boy is forever asking questions. 那個(gè)男孩老是問問題。
  這類情況常與always總是,usually通常,continually不斷的,constantly經(jīng)常的,forever永遠(yuǎn)、老是等副詞連用。