"The elephant and the duck eat."
Translation:Itheann an eilifint agus an lacha.
What is different, aside from spelling, between 'eilifint' and 'heilifint?'
The pronunciation. The "h" is added in certain cases based on grammatical rules, which you'll learn eventually. It can be very important, but isn't always.
I thought "is" is short for "agus"? Or is it only in certain fixed expressions?