Go for ZNO 2020: usage problems: Lay, lie:

•         The principal parts of lay are lay, laying, laid, laid. 

•         The principal parts of lie are lie, lying, lay, lain. 

•         Lay means “to set or put something down,” and it is usually followed by a direct object.  Lie means “to recline,” and it is never followed by a direct object.

•         Lay the vase on the desk.

•         They are laying the carpet tomorrow afternoon.

•         Jack gently laid the eggs in the container.

•         Lie down and rest for a few minutes.

•         The children are lying on the carpet.

•         They were so tired they decided to lay down.