An elliptical clause is a kind of clause with an ellipsis; meaning that there are words that are left out. So here are two sentences using elliptical clauses.
The sentence using than:
-She sees you more often than I. (The missing words here are "I see you")
The sentence using as:
-He likes the movie just as I do. (The missing words here are "I like it).
Hope this examples help.
