To answer the question "What are the children doing?", we need to understand the structure of the sentence and how to form questions in English.

Step 1: Identify the Subject

In this case, the subject is "the children." This tells us who we are talking about.

Step 2: Identify the Verb

The verb in this question is "are doing." This is the present continuous tense, which we use to describe actions that are happening right now.

Step 3: Formulate the Question

In English, to ask about what someone is doing, we start with the verb "are," followed by the subject "the children," and then we add the verb "doing." So the structure is:

• Are + subject + verb + (additional information)?

Step 4: Example Answers

Now, if we want to answer the question, we can say:

• The children are playing in the park.
• The children are studying for their exams.
• The children are watching a movie.

Each of these answers provides information about what the children are doing at that moment.

In summary, to ask what children are doing, we use the structure "What are the children doing?" and to answer, we describe their current activities using the present continuous tense.