If the verb in the predicate of a sentence expresses the existence of something, such as IMASU (to be, to exist), NI indicates where something is or exists. For example, "I am at the station" is ...

However, there are many types of nouns and noun phrases in English, and it can be difficult to know if a particular noun takes a singular verb (such as DOES / HAS / AM / IS ) or a plural verb (DO ...