Question

We wanted to know who (is singing/was singing) in the next room. I always thought he (is/was) a brave man. When I saw him, he (is working/was working) She said she (has/had) a terrible headache. We understood that she(sees/saw) nothing. My mother was sure I already (have come/had come.

Answer 1

Was singing
was
was working
had
saw
had come

Answer 2

Who is Singing/Was Singing in the Next Room: Unfortunately, without any specific context or information provided, it is difficult to determine who is or was singing in the next room. However, I can offer some general suggestions on how you might find out. One way would be to simply ask someone who might have been in the vicinity of the room or anyone who may have heard the singing. Alternatively, you could try to identify the singer by listening carefully to their voice or any distinct characteristics in the singing style.

He is/Was a Brave Man: It is stated that you always thought he was a brave man. This suggests that you held a belief about his bravery in the past, but it's unclear if your perception has changed or if he is still considered brave. To clarify, you may need to provide more information about the person in question and the context in which this belief was formed.

He is Working/Was Working: Similarly, it is mentioned that when you saw him, he is or was working. Again, without additional information, it is difficult to determine his current work status. If you are referring to a specific instance in the past, then he was working at that time. However, if you are talking about his present work situation, it would be more accurate to say he is working, assuming he is currently employed.

She Has/Had a Terrible Headache: The woman mentioned that she has or had a terrible headache. The choice between "has" and "had" depends on the timing of the statement. If she currently has a headache, then "has" would be appropriate. If she had a headache in the past but no longer does, then "had" would be correct. Without further information, it is impossible to determine the current state of her headache.

She Sees/Saw Nothing: It is stated that "we understood that she sees or saw nothing." The choice between "sees" and "saw" depends on the context. If this refers to her current ability to see, then "sees" would be correct. If it refers to a past occurrence, then "saw" would be more appropriate. Again, additional information is needed to provide a more accurate answer.

My Mother Was Sure I Already Have Come/Had Come: The sentence states that "my mother was sure I already have come or had come." The correct choice between "have come" and "had come" depends on the timing of the event. If your mother was referring to a recent event or your arrival in the present, then "have come" would be appropriate. If she was talking about an event in the past, then "had come" would be the correct choice.