【现在进行时专项练习题】在英语学习中，现在进行时是一个非常基础但重要的语法点。它用来描述正在发生或正在进行的动作。掌握好现在进行时的用法，不仅有助于提高口语表达能力，还能增强写作中的时间感和画面感。
一、现在进行时的结构
现在进行时由“be动词 + 动词ing形式”构成。根据主语的不同，be动词也会发生变化：
- I am doing
- You are doing
- He/She/It is doing
- We are doing
- They are doing
注意：动词的ing形式通常是在动词后加“-ing”，但有一些特殊规则需要注意，比如以“e”结尾的动词要先去掉“e”再加“-ing”（如：write → writing），以重读闭音节结尾的动词要双写最后一个字母再加“-ing”（如：run → running）。
二、现在进行时的使用场景
1. 描述当前正在发生的动作
例句：I am writing a letter.（我正在写一封信。）
2. 描述现阶段正在发生的事情
例句：They are studying for the exam.（他们正在为考试复习。）
3. 表达计划或安排好的未来动作（常用于口语）
例句：We are going to the park this afternoon.（我们今天下午要去公园。）
三、练习题精选
1. 选择正确的答案填空：
(1) Look! The children ______ (play / playing) in the garden.
(2) She ______ (is cooking / cooks) dinner now.
(3) They ______ (are watching / watch) a movie at the moment.
(4) I ______ (am reading / read) a book on the train.
(5) The dog ______ (is sleeping / sleeps) on the sofa.
2. 将下列句子改为现在进行时：
(1) He writes a letter.
→ ________________________________________
(2) We eat lunch at 12 o'clock.
→ ________________________________________
(3) She plays the piano.
→ ________________________________________
(4) They go to school by bus.
→ ________________________________________
(5) I watch TV every evening.
→ ________________________________________
3. 根据提示写出现在进行时的句子：
(1) Tom / run / in the park
→ ________________________________________
(2) My sister / listen to music / in her room
→ ________________________________________
(3) The teacher / explain / the lesson
→ ________________________________________
(4) We / have / a meeting / now
→ ________________________________________
(5) The baby / cry / because he is hungry
→ ________________________________________
四、常见错误与注意事项
1. 忘记使用be动词：
错误：He running.
正确：He is running.
2. 动词ing形式错误：
错误：She is swimm.
正确：She is swimming.
3. 主谓不一致：
错误：They is working.
正确：They are working.
五、总结
现在进行时是英语中最常用的时态之一，熟练掌握它的用法，不仅能帮助我们更准确地表达当下正在发生的事情，还能提升整体的语言运用能力。通过多做练习、多听多说，相信大家一定能够轻松掌握这一语法点。
参考答案（供练习后核对）
1. (1) are playing(2) is cooking(3) are watching(4) am reading(5) is sleeping
2. (1) He is writing a letter.
(2) We are eating lunch at 12 o'clock.
(3) She is playing the piano.
(4) They are going to school by bus.
(5) I am watching TV every evening.
3. (1) Tom is running in the park.
(2) My sister is listening to music in her room.
(3) The teacher is explaining the lesson.
(4) We are having a meeting now.
(5) The baby is crying because he is hungry.
