Hello.
I want to ask about something - from view of natvie speakers. I want to know can I use this sentence and is it grammatically appropriate.
This sentence is: "Everything what he said was true"
And what is the diffenece between the first and this one: "Everything that he said was true".
This is the link to the task in Polish where it all sarted... https://forum.duolingo.com/comment/2312866
I hope, I don't do many mistakes.