which transition word or phase shows a time relationship.

One transition word that shows a time relationship is "first."

The transition words and phrases that indicate a time relationship include:

1. First, second, third, etc.: These words are used to show the sequence or order of events in a series.
For example: "First, I woke up. Then, I brushed my teeth."

2. Meanwhile: This word indicates that two events are happening at the same time.
For example: "I was cooking dinner. Meanwhile, my husband was setting the table."

3. Before, after: These words show the chronological order of events.
For example: "Before going to bed, I always read a book."

4. Meanwhile, during, while: These words are used to indicate that an action happened at the same time as another action.
For example: "He was talking on the phone while I was doing my homework."

5. Next, then, afterward: These words indicate the sequence of events.
For example: "I finished my work, and next, I went out for a walk."

By using transition words and phrases like these, you can clearly indicate the relationships between events or actions happening in a specific order or at the same time.