Emoticons are pretty important: Harvard cognitive scientist Steven Pinker says they're an extremely useful linguistic evolution. The Oxford English Dictionary named "crying face" the word of the year. Humans collectively send 6 billion emoticons every day. But they don't teach emoticons in school, and some of them are actually hard to understand — at least for some of us.
Subjects and verbs must agree in number. This is the cornerstone rule that forms the background of the concept. The dog growls when he is angry. The dogs growl when they are angry. 2. Don’t get confused by the words that come between the subject and verb; they do not affect agreement.