I know that in general we use Past Perfect to say that one action happened before another past action or moment in the past. Past Simple is used, for instance, for succession of past actions. Nevertheless we could use past simple with adverbs such as "before", "after", or "when" to show this successsion.
Today I've faced with one interesting moment. As far as I understood we should use Past Perfect with some additional information. I mean for example the following two sentences:
- "I had made decision to do this exercise before she did it".
- "I made decision to do this exercise before she did it".
Since we use Past Perfect something has changed in our attitude. e.g.:
"I had made decision to do this exercise before she did it. I will practice another one" (completed additional meaning). And as for second statement it doesn't matter whether she had already done it or not, I'll do it anyway.
Am I right?