everything we've been through
- idiom
- After everything we've been through, I really don't want to deal with this as well.
Examples
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I'm not sure there is a way to go back to normal after everything we've been through.
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Why are you doing this to me after everything we've been through together?
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With everything we’ve been through, I'm not surprised , -
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Do you realize that after everything we've been through, what a betrayal this is?
Surface Forms
Morphology
everything + we've + be + through
The meaning 'all the experiences and challenges we have shared or endured' is directly derivable from the constituents: 'everything' (all), plus 'we've been through' where 'been through' uses the spatial/metaphorical sense of 'through' meaning to pass or undergo. This composition is a common, cross-linguistic metaphor (to 'go/come through' an experience), so a B1 learner who knows the parts will readily infer the MWE meaning.
Etymology
Everything we've been through makes you imagine two people walking the same long, hard road; everything is all the events and through shows they passed those hard times together. So it means 'all the experiences and challenges shared'.