Buy the Food
I have the question about the sentence in perfect form.
What I want to say: "I bought some food and brought it home, put in my fridge. A food was in my fridge. But all was ended and I went to a supermarket again and brought purchases home ".
The sentence: "I had bought a food. And have bought a food again".
Right?

Question

Answer

food в данном случае неисчислимое существительное и не может быть с неопределённым артиклем. А так не понятно что вы спрашиваете. I have bought food for years, and still do this. I had bought food in past, but since last week my wife do this.

Answer

It's really not clear what you are asking. But yes, if an action in the past precedes another action that happened in a more recent past, like buying food, then yes: "I had bought some food previously, but then it all ran out, so now I've bought more food."