The boy looked very (sad/sadly) He looked at his friend (sad/sadly) You can (do/to do)

whatever you like The two sisters were so (angry/angrily), they always (looked/were looking) ugly He (washed/was washing) his (hair/hairs) when the telephone (rang/was ringing). That was why he (didn't answer/wasn't answering) it. Neither Fred nor Larry (play/plays) (piano/the piano)