Lay and Lie
Full conjugation of "lie," as in "to lie down" or "to lie" on something.
"Lay" as a Regular Verb
"Lay" has the same parts as other regular verbs--only it uses the spelling "laid" and not "layed" for the past tense:
Present: Now I lay the book on the table.
Past: I laid the book on the table yesterday.
Present Participle: While I was laying the book on the table, the phone rang.
Past Participle: After I had laid the book on the table, it fell off.