现在进行时是英语语法中的一个重要时态,它用于表达当前正在进行的动作或持续到当前的一段时间内的行为。下面是对现在进行时的详细解释和练习题解析。
一、现在进行时的概念与结构
现在进行时的概念是表示说话时刻正在进行的动作或现阶段持续的动作。例如,“我正在读英语”就表明这个动作在说话的那一刻正在进行。现在进行时的结构由三部分组成:主语 + Be动词(am, is, are) + 动词的现在分词形式(Ving)。
二、现在进行时的句型用法
1. 陈述句(肯定句):主语 + be + 现在分词,例如:“I am reading English.”、“He is writing.”和“You are running.”。
2. 一般疑问句:Be动词 + 主语 + 现在分词,例如:“Are you singing?”和“Is he (she) listening to music?”,回答形式是“Yes, 主语 + be.”或“No, 主语 + isn't/aren't。”
3. 特殊疑问句:疑问词 + be + 主语 + 现在分词,例如:“What are you doing?”和“What is he (she) doing?”。
4. 否定句:主语 + be + not + 现在分词,例如:“I am not reading English。”
三、现在分词的变化规则
1. 一般情况下,动词后面直接加-ing,如:play-playing。
2. 以不发音的e结尾的动词,去掉e再加-ing,如:make-making。
3. 末尾为一个元音字母加一个辅音字母的动词,双写末尾的辅音字母再加-ing,如:run-running。
四、现在进行时基础专项练习
1. 写出下列动词的现在分词:
play-playing, sing-singing, go-going, feed-feeding, read-reading, eat-eating, write-writing, have-having, make-making, dance-dancing, live-living, ride-riding, take-taking, eat-eating, put-putting, cut-cutting, run-running, swim-swimming, sit-sitting。
2. 用所给动词的正确形式填空:
1. The boy is drawing a picture now.
2. Listen. Some girls are singing in the classroom.
3. My mother is cooking some nice food now.
4. What are you doing now?
5. Look. They are having an English lesson.
6. They are not watering the flowers now.
7. Look! The girls are dancing in the classroom.
8. What is our granddaughter doing? She is listening to music.
9. It's 5 o'clock now. We are having supper now.
10. Is Helen swimming?
通过以上练习,你可以更好地理解和掌握现在进行时的使用。现在进行时在日常对话和写作中非常常见,尤其在描述正在进行的动作或强调动作的连续性时。熟练运用现在进行时能让你的英语表达更加生动和准确。