To understand the mood, you need to consider the full sentence and its context. Here are some examples:
Indicative Mood:
* "The runner crossed the line first." (Describing a fact)
* "I crossed the line when I said that." (Stating a past action)
Imperative Mood:
* "Cross the line and you'll be disqualified." (Giving a command)
Subjunctive Mood:
* "I wish I had crossed the line sooner." (Expressing a wish or hypothetical situation)
Conditional Mood:
* "If I cross the line, I will get a penalty." (Expressing a hypothetical situation)
Therefore, the mood of "cross line" depends entirely on the context and the intended meaning.