English Language Glossary - I

Idiolect:

The form fo langauge used by, and unique to, a single individual

Idiom:

An expression whose meaning cannot be understood from the meanings of the individual words that make up the expression.

Imperative sentence:

A sentence that is a command

Infinitive:

A form of a verb that does not specify person or number

Interrogative sentence:

A sentence that is a question