In normal speech, most people pronounce unaccented have as /əv/, and so it would make sense to write it "'ve".
But in fact, this is not common except in I've and they've, (where it loses the vowel and sounds like /v/), and in the forms would've, should've and could've.
You can find other examples occasionally, but they're not common. For example, in the iWeb corpus there are 36 instances of people've, compared with 20820 of should've, and 449 594 of they've.
Answer from Colin Fine on Stack ExchangeVideos
What are contractions?
When should you use contractions?
What are some examples of contractions?
In normal speech, most people pronounce unaccented have as /əv/, and so it would make sense to write it "'ve".
But in fact, this is not common except in I've and they've, (where it loses the vowel and sounds like /v/), and in the forms would've, should've and could've.
You can find other examples occasionally, but they're not common. For example, in the iWeb corpus there are 36 instances of people've, compared with 20820 of should've, and 449 594 of they've.
The 've contraction works with:
- I've = "I have"; and
- they've = "they have";
- you've = "you have";
- we've = "we have";
- (one) must've = "(one) must have";
- (one) should've = "(one) should have";
- (one) could've = "(one) could have";
- (one) would've = "(one) would have".
Those not listed above, including "my parents have", cannot usually be contracted in the same manner.
My parents have just arrived
You may alternatively choose to refer to your parents as "they" and therefore use "they've" in your sentence.
My parents (they) have just arrived.
- They've just arrived.
- Who?
- My parents.
- They must've been traveling all day.
In addition to whether it is possible to be used, it should also be noted that contractions such as these are generally more informal and something should be avoided. When writing an academic paper, for example, it is often advised to use the full phrase ("I have" or "should have") instead of opting for the contraction.
For example, "I've never met my parents; I have no idea who they're."
or
Is anyone else hungry? Because we're.
Obviously, those are both terrible sentences, but if they're=they are and we're=we are, shouldn't it work?