Good - well. Good is an adjective. Well is typically used as an adverb but may be used as an adjective to refer to the state of someone's health.
To say someone looked good is a bit confusing at first, but looked is a verb that often takes a predicate adjective, for example, it looks cold, not it looks coldly.
If - whether. If is often used colloquially for whether in such sentences as "He doesn't know whether he will be able to leave tomorrow." In written material, especially more formal prose, use whether in such expressions as see whether, learn whether, know whether, and doubt whether. Also use whether when the expression or not follows or is implied.
Graduated - was graduated. Both forms are acceptable. However, use from after either expression.
Source: The Gregg Reference Manual