Jack's got a pretty bad frequency.
Have as an Auxiliary Verb
When have is an auxiliary verb, it is helping a full verb to make a Present Perfect sentence.
I have never been on top of a control tower.
Has she tried the new taxiway?
- Yes, she has.
- No, she hasn't.
They've been flying cross country all day.
Why haven't you eaten the in-flight meal yet?
Have as a Full Verb
We commonly use have as a full verb to describe possession, obligation, relationships, illnesses, etc.. We do not use continuous forms for these meanings:
- I have two pilots. (relationship)
- I am having two pilots.
- Does she have a pilots licence? (possession)
- Is she having a new pilots licence?
- They don't have a lot of fuel. (possession)
- They aren't having a lot of fuel.
- Do you have a headache? (illness)
- Are you having a headache?
- He has to fly soon. (obligation)
- He is having to fly soon.
- She doesn't have a stomachache. (illness)
- She isn't having a stomachache.
For these meanings, we can also use have got instead of have.
- I have two pilots.
- I've got two pilots.
- Does she have a new pilots licence?
- Has she got a new pilots licence?
- They don't have a lot of fuel.
- They haven't got a lot of fuel.
- Do you have a headache?
- Have you got a headache?
- He has to fly soon.
- He's got to fly soon.
- She doesn't have a stomachache.
- She hasn't got a stomachache.
Have got is only used to describe the present. For the past, use had (had got) and for the future, use will have or be going to have:
- I will have my pilot's licence tomorrow.
- I had to go to the hangar early yesterday.
- She had long hair when she was a private pilot.
- We didn't have colour radar thirty years ago.
- When my engine hesitates, it usually means I'm going to have fuel starvation soon.
Dynamic / Action Meanings of Have
Have, not have got, can be used to describe actions with the following nouns:
- a takeoff, a departure, an arrival, a landing
- a clearance, a meeting, a briefing
- a dream, a conversation, a flight
For these meanings, it is possible to use continuous tenses:
I'm having a great flight!
We were having a meeting when you called.
She is having a passenger briefing in aircraft.
It sounds like someone is having a good landing.
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