For the sentence "I am/make sure (that) I do my best", can I also say "I am/make sure to do my best", and for the sentence "I am certainly going to do my best", can I also say "I am/make sure to do my best", as well?
I mean, 1) do the sentences "I am sure (that) I do my best" and "I make sure (that) I do my best" mean the same, 2) can the sentences "I am sure (that) I do my best" and "I make sure (that) I do my best" be said as "I am sure to do my best" or "I make sure to do my best", and 3) can the sentence "I am certainly going to do my best" be also said "I am sure to do my best" or "I make sure to do my best" as well?
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I mean, 1) do the sentences "I am sure (that) I do my best" and "I make sure (that) I do my best" mean the same, 2) can the sentences "I am sure (that) I do my best" and "I make sure (that) I do my best" be said as "I am sure to do my best" or "I make sure to do my best", and 3) can the sentence "I am certainly going to do my best" be also said "I am sure to do my best" or "I make sure to do m