333. Wrong use of that in direct speech
(X) She said that, 'I'm sure to pass.'
(O) She said, 'I'm sure to pass.'
We can't use "that" in direct speech.
Note: In indirect speech we say: He said that he was sure to pass.
334. Using a double comparative
(X) He's more stronger than John.
(O) He's stronger than John.
Double comparatives are incorrect "more stronger" ought to be only "stronger".
However, we can say "much stronger".
335. Misuse of adjectives that can't be compared
(X) My work is more perfect than his.
(O) My work is superior to his. "or" My work is better than his.
Certain adjectives can't be compared: perfect, unique, preferable, supreme, right, correct, etc.