范文：
He is doing [activity or task]. For example, "He is reading a book," "He is cooking dinner," "He is writing an email," "He is playing the guitar," "He is watching a movie."
常见问答知识清单：
1. What does "He is doing" mean in English?
2. How do you express different activities using "He is doing"?
3. Can you use "He is doing" with any verb?
4. What is the difference between "He is doing" and "He does"?
5. How do you use "He is doing" in a sentence?
6. Can "He is doing" be used in the past tense?
7. What is the present continuous tense used for?
8. Is "He is doing" only for he/him?
9. How do you say "He is doing something" when you want to be more specific?
10. Can "He is doing" be followed by an adverb?
详细解答：
1. What does "He is doing" mean in English?
"He is doing" in English is used to describe someone performing an action at the moment of speaking. It is part of the present continuous tense.
2. How do you express different activities using "He is doing"?
To express different activities, you simply replace the word "doing" with the appropriate gerund or present participle form of the verb. For example, "He is walking," "He is eating," "He is thinking."
3. Can you use "He is doing" with any verb?
While "He is doing" can be used with a wide range of verbs, it's most commonly used with dynamic verbs (actions) rather than static verbs (states). For static verbs, the present continuous tense is less common, and you might use the simple present tense instead.
4. What is the difference between "He is doing" and "He does"?
"He is doing" is the present continuous tense and refers to an action in progress at the moment of speaking. "He does" is the simple present tense and can refer to habitual actions, general truths, or abilities.
5. How do you use "He is doing" in a sentence?
You can use "He is doing" in a sentence like this: "He is studying because he wants to get a good grade."
6. Can "He is doing" be used in the past tense?
Yes, "He was doing" is the past continuous tense, which is used to describe an action that was happening at a specific time in the past. For example, "He was watching TV when the phone rang."
7. What is the present continuous tense used for?
The present continuous tense is used to describe actions that are in progress at the moment of speaking, to express temporary states, or to indicate an upcoming action.
8. Is "He is doing" only for he/him?
No, "He is doing" can be used for any male subject, not just "he/him." For female subjects, you would use "She is doing," and for plural subjects, "They are doing."
9. How do you say "He is doing something" when you want to be more specific?
To be more specific, you can add details to the sentence. For example, "He is reading a book about history," "She is playing the piano in the living room."
10. Can "He is doing" be followed by an adverb?
Yes, "He is doing" can be followed by an adverb to provide more information about how the action is being performed. For example, "He is carefully reading a book," "She is energetically dancing."
