1. When is the report due?
It is due on Monday.
2. When is the book due?
It is due on March 10th.
(Are the short dialogues correct?)
3. What are you saying?
4. What are you speaking?
5. What are you talking about?
(Are the three commonly used and grammatical?)
1 and 2 are correct.
3 and 5 are correct and commonly used.
1. The first two dialogues are correct and grammatical. The question and the response provide clear information about the due dates of the report and the book.
2. As for the third dialogue, "What are you saying?" is a commonly used and grammatically correct question. It is asking someone to clarify or repeat what they just said.
3. The fourth dialogue, "What are you speaking?" is grammatically correct, but it is less commonly used in everyday conversation. A more typical way to ask someone to clarify or repeat what they just said would be, "What are you talking about?" or "What did you say?"
4. The fifth dialogue, "What are you talking about?" is commonly used and grammatically correct. It is asking someone to specify the topic or subject they are discussing.