Don't make your sentence too short or too general. Let's look again at PEN : WRITE Suppose you made this sentence: A PEN is a thing and to WRITE is an action. This sentence is too vague. It describes each word individually, but it doesn't describe the relationship between the words. Lots of very different pairs of words can fit in there, including: ROCK : SWIM HAT : EAT PIANO : THROW None of these word pairs captures the specific relationship between pen and write. Always make a sentence that captures the relationship in the pair of words.