To tak:
lay, laid, laid - to put sb/sth in a particular position, especially when it is done gently or carefully.
Ex. She laid the baby down gently on the bed. Ç He laid a hand on my arm. The horse laid back its ears. Relatives laid wreaths on the grave.
Some speakers confuse this sense of lay with lie, especially in the present and progressive tenses. However, lay has an object and lie does not: She was lying on the beach. NOT (She was laying on the beach). Why don’t you lie on the bed? NOT Why don’t you lay on the bed? In the past tenses laid (from lay) is often wrongly used for lay or lain (from lie): She had lain there all night. NOT She had laid there all night.
lie1 (lies, lying, lay) past form. lain, lain
A)(of a person or an animal) to be or put yourself in a flat or horizontal position so that you are not standing or sitting:[v + adv. / prep.] to lie on your back / side / front
Ex. The cat was lying fast asleep by the fire.
B) (of a thing) to be or remain in a flat position on a surface:[v + adv. / prep.] Clothes were lying all over the floor.
Ex. The book lay open on his desk.
C)to be, remain or be kept in a particular state:[v-adj] Snow was lying thick on the ground. Ç These machines have lain idle since the factory closed. Ç [v + adv. / prep.] a ship lying at anchor
Ex. I’d rather use my money than leave it lying in the bank.
D) [v + adv. / prep.] (of a town, natural feature, etc.) to be located in a particular place
Ex. The town lies on the coast.
E)[v + adv. / prep.] to be spread out in a particular place
Ex. The valley lay below us.
lie2 (lies, lying, lied, lied) [v] lie (to sb) (about sth) to say or write sth that you know is not true:
Ex. You could see from his face that he was lying. Don’t lie to me! She lies about her age. The camera cannot lie (= give a false impression).
spread = put down = lay