I lay my book on the table, but now i cannot find it. or I laid my book on the table, but now i cannot find it.

Question

Which one is using regular and irregular verbs

Answer 1

The second sentence is much better.

Answer 2

I laid my book on the table is using a regular verb which is laid

Answer 3

Yes, the second sentence is correct, but remember that "lie" and "lay" are confusing because they are irregular verbs:

http://englishplus.com/grammar/00000233.htm