Some instances where “an” may be used as preposition:
Here it means in or from
Mwen fèk sot an Ayiti maten an.
I just came from
Haiti this morning.
Mwen te fèt an Giyàn.
I was born in
Mwen te ale an Ayiti semèn pase
I went to
The above sentences can also be used without “an”.
Or sometimes “an” is used to show the order of things.
Li te vini an dènye.
He came in last.
Fè nou pase an premye.
Let us go first.
Fè ti moun yo kanpe an de ran.
Have the kids form two lines.
“an” may indicate what something is made of
7. Li fèt an ò (or annò). – It’s made of gold
8. Li fèt an fè (or anfè) – It’s made of iron
9. Li fèt an asye - It's made of steel
10. Li fèt an bwa (or anbwa) – It’s made of wood
11. Li fèt an plastic – It’s made of plastic
“an” may indicate in what manner something is done.
L’ap pale avè’m an chèf.
He’s talking to me as if he was my boss.
Sitiyasyon chanje an kòbòy (Cowboy)
The situation change for the worse (dangerous).
As far as “ki” and “ke” is concerned, you won’t see “ke” that often. When you do it’s usually used as a conjunction:
14. Mwen te di’l ke m pa't grangou.
I told her that I was not hungry.
15. Mesye ke ou te wè a se te papa m.
The man that you saw was my father.
16. Nou te espere ke legliz te gentan fin konstwi.
We had hoped that the construction of the church was completed.
And ... the above sentences will work fine without “ke”
And “ki” would be use as pronoun:
17. Moun ki dwe pa janm dòmi anpè.
People who have debts never sleep peacefully
18. Fanm ki konn travay jaden p'ap janm dòmi grangou.
Women who know how to farm will never go to bed hungry
19. Gason ki twò brav se nan simityè yo abite.
Men who are too gutsy live in the cemetery.
20. Timoun ki derespektan pa viv lontan.
Kids that are discourteous don't live long.