The core idea here is that by writing out a complete sentence you learn the context in which a word is being used. For example, if you're learning "There are el

The core idea here is that by writing out a complete sentence you learn the context in which a word is being used. For example, if you're learning "There are elephants at the zoo", you need to learn not only the word "There", but also the context "There" + "are elephants at the zoo". Writing out a complete sentence helps bind the concept to the context.