Yesterday he lay in bed all day.
He lay on the floor.
I lay on the floor last week and you didn t say anything.
Yesterday i lay down next to her.
She laid the blanket on the floor when i asked.
He lay on the floor.
Here s where it can get a bit tricky.
The past tense of lie is lay but not because there is any overlap between the two verbs.
They both have more than one meaning but the two meanings that are the closest are the ones you are thinking of.
She had laid careful plans.
He is lying on the bed and why don t you lay it on the bed.
The past tense of lie is lay and the past participle is lain.
You can say you said to lie down but not i said laid down because it makes no sense.
By being able to put your socks on after you first put your shoes on.
He is laying on the bed or why don t you lie it on the bed.
He has lain down with us.
You cannot say anything in the past unless you employ my time machine.
The past tense of lie is lay and the past participle is lain.
He punched mr stockton and kicked him to the head as he lay vulnerable on the ground and also kicked mr carty as he too lay on the floor.
The past tense and past participle of lay is laid.
So when you say i lay down for a nap you re actually using the verb lie not lay despite the way it sounds.
Don t lie to me.
They laid the groundwork.
Don t lie on the floor.
No they re not interchangeable as someone else was asking.
I felt sick so i lay down.