I tried to dash off an approximate plan

[Boris Tatarenko]

Today I have learn a new phrasal verb "to dash off" and now I'm trying to memorize it by using it in different contexts.

Would you mind telling me whether these sentence are correct and sound natural to you?

1. I tried to dash off an approximate / a rough plan on the blackboard to explain entangled and intricate moments. (also what sounds more natural? a rough plan or an approximate plan?)

2. I'm sorry but I have to / must dash off. I have a meeting in 10 monutes! (Is "have to" better in this sentence? Does "must" imply that I'd like to stay longer?)

Thanks in advance.

 

[Boris Tatarenko]

Nobody helps.

 

[MikeNewYork]

We have dealt with ths question before.

 

[Rover_KE]

I can't find the thread Mike's referrring to.

1. I'd use 'a rough plan'.

2. I'd say 'I have to dash (off)'. Neither option implies that you'd like to stay longer.

 

[MikeNewYork]

I could have sworn I answered this question before.