"singular" or "plural"? - When I want to talk about something general...
When I want to talk about something general like below, which one should I use? I'm not talking about a specific thing with the listner, just taking generally. If any of them are wrong, please correct.
Elephants have a long nose(trunk)
An elephant have a long nose(trunk)
Elepahnts have long noses(trunks)
Elephant has a long nose(trunk)
Birds have a beak.
A bird have a beak.
Birds have beaks.
Bird have a beak.