There is and there are introduce the existence or presence of something. The word there in these constructions is not a place -- it is a dummy subject, a grammatical placeholder. The real subject comes after the verb.
The real subject here is a pharmacy. The sentence means: a pharmacy exists on the corner.
Agreement with the real subject
The verb agrees with the noun that follows it, not with there.
| REAL SUBJECT | VERB | EXAMPLE |
|---|---|---|
| singular noun | is | There is a problem. |
| plural noun | are | There are several options. |
| uncountable noun | is | There is some water in the jug. |
With singular and uncountable nouns, use is. With plural nouns, use are.
Negatives
For negatives, add not after the verb, or use the contractions isn't / aren't.
Two more patterns are common in negatives: there isn't any + uncountable or singular noun, and there aren't any + plural noun.
To emphasize the absence, use no directly after the verb. The verb stays positive.
Questions
Invert the verb and there to form a question.
Short answers follow the same pattern: Yes, there is / No, there isn't and Yes, there are / No, there aren't.
Contractions
There's is the standard contraction of there is. It is extremely common in both speech and informal writing.
There're exists as a contraction of there are, but it is rare in writing and awkward to pronounce. In everyday speech, many people use there's even with plural nouns -- there's two options. This is accepted in conversation but not in formal writing.
Other tenses
The construction works with any tense of be. The agreement rule stays the same -- match the verb to the real subject.
Lists after there is / there are
When a list of items follows, the verb often agrees with the first item in the list.
Here the first item (a desk) is singular, so there is sounds natural. Strictly speaking, the full list is plural, and formal writing may prefer there are. In practice, both forms are widely used with mixed lists, and matching the first item is the more common choice.
There as a place vs. there as a dummy subject
The word there has two different roles in English. As a place adverb, it points to a location. As a dummy subject, it introduces existence.
The difference is clear from word order and stress. In spoken English, the place adverb there carries stress; the dummy subject there is unstressed and reduced.
Common mistakes
Singular vs. plural
Uncountable nouns
Negatives
Questions
Past tense