communicate something to someone
to say or write something to someone; to tell someone something. Will you please communicate my regards to her? I intend to communicate your request to the front office this morning.
communicate with someone
1. Lit. to correspond or talk with a person. I have to communicate with Wally first. As soon as I have communicated with Fred, I can give you an answer.
2. Fig. to make oneself understood with a person. (Often used with a negative.) I just don't seem to communicate with Sam, no matter what I do. We just can't seem to communicate with each other.
let alone someone or something
not to mention or think of someone or something; not even to take someone or something into account. (Fixed order.) Do I have a dollar? I don't even have a dime, let alone a dollar. I didn't invite John, let alone the rest of his family.
let someone or something alone
and leave someone or something alone; leave someone or something beto avoid touching, bothering, or communicating with someone or something. Leave me alone. I don't want your help. Let it alone! Don't touch it! It may be hot!