1. Is this correct (grammatically)?

Question

I bought bananas, strawberry, honey, and some books. ( also are the commas placed correctly?)
(And do you call punctuations in English mechanics?)
2.Do I use the word "had" to emphasize something? Ex: The communist had transformed their country.

Answer 1

1. Your commas are correct. However, it should be strawberries (plural).

2. We use "had" to show an action that occurred in the past and no longer is occurring.