1) I found him dead.
2) He painted the car red.
3) He will make them strong.
I get confused using adjective in these typs of sentences for being a non native speaker because sometimes some sentences sound bad to me. So I use a trick to understand whether it's correct or not.
4) I found him as dead.
5) He painted the car as red.
6) He will make them as strong.
I use "as " before adjective. If it makes sense to me with using "as", then without as it should be correct too. It's just my presumption.
My question is, Are my three sentences [4,5,6 ] perfectly correct?