When I arrived, she had already left town.      (Things had always happened that way.) Good job! Now, remember: HAD never changes in the Past Perfect. So the rest of these should be simple for you. (Well, simple for us to say....)


Past Perfect Negative?
(S + HADN'T + V3 + {S + V2})
 She hadn't eaten before I left.

Now you should notice that you could also say:
({S + V2} + S + HADN'T + V3 )
Before I left, she hadn't eaten.

Both
are correct. But in either case remember the Past Perfect always needs a TIME in the past so it can happen before that.  That TIME statement can be one word:

Monday I still hadn't studied.

or it can be a few words or a prepositional phrase:

By last Monday, I still hadn't studied yet.


or very often, it will be a full TIME CLAUSE, with its own subject and verb (V2), but in the Past Simple tense.

When I went to school Monday, I still hadn't studied yet.
(Sound familiar? Notice that we add words like "yet" and "already" to make the time clearer.)

If you remember that the TIME CLAUSE is Past Simple, it should be easy for you to do a Past Perfect Negative:
({S + V2} + S + HADN'T + V3 )
moved sick when hasn't she became hadn't yet I
____ ____ ____ ____ ____ ____ ____ ____ .




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