and (Preposition) — With the addition of; increased by. ex. "one and one is two"
and (Conjunction) — Used to connect words, clauses or sentences; used to indicate that the following thing is also included, or add an additional point. ex. "eggs, chips and bacon"
and (Conjunction) — In order to; used instead of "to", especially after try, come, go. ex. "I'll try and do that before tomorrow"
and (Conjunction) — Used to indicate causation or something that follows. ex. "do that and I'll scream"