As if + past simple
Incorrect . He talks as if he knows everything.
Correct : He talks as if he knew everything.
Incorrect : She spends as if she is very rich.
Correct : She spends as if she were very rich.
Note: The phrase ‘as if’ is followed by the past simple tense. In case of the ‘to be’ verb, whatever may be the subject the form ‘were’ is usually used.
