Hello

which sentence is correct? I'm not sure.
as I had learned much from garfield high school.
or I have learned much from Garfield high school.

Should I use had or have? thank you

The first sentence implies that you've forgotten what you learned.

The second sentence is probably what is meant by this sentence.

thank you very much.

You're very welcome.

To determine whether to use "had" or "have" in your sentence, you need to consider the context in which the action took place.

If you are referring to a past action that is completed and no longer ongoing, you should use "had." For example:

"I had learned much from Garfield High School." (referring to a specific period in the past when you were a student at Garfield High School)

On the other hand, if you are referring to a past action that is still relevant or ongoing, you should use "have." For example:

"I have learned much from Garfield High School." (referring to the knowledge and experiences gained throughout your time at Garfield High School that are still significant in the present)

So, the correct sentence would depend on whether you are talking about something that happened in the past and is no longer continuing (in which case you should use "had"), or if you are talking about something that is still significant in the present (in which case you should use "have").