一．定义及结构
定义：现在进行时表示正在发生或进行的动作.
结构：be 动词ing〔现在分词〕
二．句型结构
三．现在进行时的用法
1. 说话的时候正在发生的动作，常见时间标志:now, at the moment等
Linda's brother is watching TV now.
What are our parents doing at the moment?
2. 现阶段一直在进行的动作，常见时间标志:these days, this week, this month等
These days we are helping the farmers work on the farm.
They are having a test this week.
Mr. Cheng is visiting our village this month.
3．表示说话人的情感，当其与always, often, forever, continually, constantly等副词连用时,表示重复的动作,有极大的感情色彩,表示不满或满意。
She is perpetually interfering in my affairs. 她老是干预我的事.（不满）
The students are making progress constantly. 学生们在不断进步.（满意）
4．be going to 动词原形,这一句型表示即将发生的事或打算（准备）做的事,我们把它归在将来时里。
I am going to pay a visit on him tomorrow.
5．现在进行时有时可用来表示一个在最近按计划或安排要进行的动作,即是说可以用来代替将来时,但此时，一般要与表示将来的时间状语连用,而且仅限于少量动词.go, come, leave, start, arrive, return, sleep等。
I am leaving later.
We are leaving on Friday.
Are you going to Tianjing tomorrow？
How many of you are coming to the party next week？
6．在句中出现了Look，Listen，Can't you see? 等暗示词时
Look! Maria and Tom are dancing under the tree.
Listen! Our English teacher is singing the English song.
Many children are swimming in the river. Can’t you see?
7. 有的动词用于现在进行时表示“逐渐”的含义.此种用法除了偶尔和now连用外,一般不和其他时间副词连用.适合于此种用法的动词有：bet/grow/become/turn/run/go变成,begin, forget, remember, die, finish, find, rise等。
Our study is becoming more interesting.
The leaves are turning red.
The war is ending.
Wait a moment; I am finishing my supper.
8．有的现在进行时句子和一般现在时同义.用现在进行时表示问者的关切心情.
How are you feeling today? （How do you feel today?）
I am looking forward to your next visit. （I look forward to your next visit.）
Why are you looking so sad? （Why do you look so sad?）
9．“be”动词的现在进行时.
“be”动词用于现在进行时表示说话者认为是短暂的、和平常不一样的、甚至是伪装的.
适合于此种用法的有：foolish, nice, kind, careful，patient, lazy, silly, rude, polite, impolite等表示人的特性、性格的形容词
He is being foolish. 他在装傻
He is being honest. 他表现得特别老实
She is being rude. 她故意表现粗鲁
I can't understand why he is being so selfish.我不明白此时他为何如此自私
注意： “be”动词用于现在进行时表示人的行为,纯粹表示心理或生理的状态而不带有行动时或主语不是人时,“be”动词不能用于现在进行时。
I am happy.（纯粹的心理状态, 不可用am being）
He is tired.（纯粹的生理状态, 不可用is being）
It is hot today.（主语不是人, 不可用is being）
10. 注意根据上下文的暗示，句子的谓语动词可能应用现在进行时。
Where is Mr Wang?
Oh, he is reading a newspaper in the office.
11. 在时间、条件状语从句中,有时可用现在进行时代替一般将来时。
When you are passing my way, please drop in.
12.作为表语时,英语介词可以表示正在“进行”的动作。
He is at work. (他正在工作)
The house is on fire! (房子着火了)
The road is under construction. (路正在修)
不宜使用现在进行时的动词
四．现在进行时和一般现在时的区别
五．现在分词变化规则
