Extracted from Official ielts practice materials 2
....
Examiner Comments
Band 7
The candidate speaks fluently and gives appropriate and
extended responses to the questions and tasks. She has a wide
and effective use of discourse markers and cohesive devices.
There is occasional hesitation or repetition while she searches for
language, but this does not affect coherence. She uses a wide
range of vocabulary, including some less common and idiomatic
items and an effective use of collocation. However, there are
some inappropriacies in word choice and formation. Her grammar
has a good range of both simple and complex structures. Many
of her sentences are error-free, but there are noticeable errors
in areas such as articles, prepositions, and occasionally in verb
tense. Her pronunciation is clear and easy to follow. She uses
both sentence stress and intonation effectively to convey
meaning. Her accent is noticeable in the occasional stressing
of weak forms and in some faulty syllable stress within words;
however, this does not affect intelligibility. This is a high-level
candidate with good range of language. The number of errors
and variable control limit her rating to a Band 7.