Grammar check this sentence please?

Question

My book says that the following sentence is correct:

After her walk, she lay down for a short nap.

Answer 1

Yes it's correct, but you're probably used to hearing it something like "after her walk, she laid down for a short nap" because when using the word after, you assume it's past tense and use a past tense verb.

Answer 2

Yep, it's right. Are you questioning the use of lay?

Present: lie

Past: lay

Past Participle: lain

• I think I’ll lie down for a while.

• Yesterday I lay awake instead of napping.

• I could have lain there fruitlessly, but instead I got up and vacuumed.

Answer 3

What's your question?