I penned a letter to my friend.
NOTE: In the USA, we'd just say wrote.
What proportion of the marks you get for this sentence do you deserve, considering it was not you who penned it.
It is comparatively easy to use "comparatively" in a sentence.
natal is easy to use in a sentence.
"It is easy to use an exponent in a sentence." There, that sentence uses it!
This is too easy!
Its very easy.
Easy, ask youjin.
Its very easy.
Hovering a word in a sentence make it easy to find afterwards.
The test questions were easy! "Easy does it!" the man said to his horse. Are the classes at this school easy or hard?
The choir sang an elegy at the funeral of the mayor.
The Principia Mathematica, penned by Newton in the late 1600s, was a ground-breaking publication in physics. The wild horses had been penned in makeshift corrals.