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lay---laid---laid----(vt ---pt---pp)
eg:-The hen laid an egg yesterday.
eg;-Our car laid at a stopping-place for traffic accident beside road yesterday !
lie---lay---lain---(vi---pt---pp)
eg:-We were lazying in the sun on the Beach yesterday.
-----Being horizontally situated at rest,we lay there yesterday.
The simple past tense:-
I had, I went, He had, He went. I began, I sang, I played.I brought, I came, I went, I kept, I learnt, I said, I saw, I sat.
eg:-I bought a book and pencil yesterday.
eg:-He left home at 10am yesterday.
Both actions began and completed in the past without any connection with the present. Note that the adverb "yesterday" and the adverbial "this morning" are used in these sentences.Similar words and expressions (adverbs and adverbials of time) includ:-last year, once, two weeks ago, two days ago, when I was young, when we were young.)