The plural of lay-by is lay-bys.

Lay Lady Lay was created on 1969-03-27.

The present tense of "lay" is "lay" or "lays" depending on the subject.

you lay

If you mean the noun "lay", the plural is "lays". If you mean the plural form of the verb, it is always lay: we lay, you lay, they lay. Note: lay is a transitive verb. One can lay eggs, tables, and other people! The past tense of "lay" is "laid". The form "lay" is also the past tense of the intransitive verb "lie". E.g. Everyday I lie on my back for an hour. / Yesterday I lay on my back for an hour.