This is an old revision of the document!
More info about Agent, Patient and ergativity should be added
Subject is one of two main parts of sentence together with predicate. It usually express the person or thing which makes or is modified by the action (predicate). However subject may be omitted, typically in impersonal and imperative clauses. Subject may be presented by following forms:
Examples needed
It may be hard to distinguish subject from other parts of sentence in following cases: