If it wasn’t/weren’t for…
Definition 1 of 1
Pro Tip 1/3Causality Highlight
Emphasizes the cause of an event not happening or a situation being different. 
We wouldn't have discovered the error if it wasn't for your attention to detail.
Pro Tip 2/3Counterfactual Thinking
Used for imagining a different outcome in a hypothetical situation. 
If it weren't for the rain, we could have had the picnic.
Pro Tip 3/3Gratitude Expression
Commonly used to express thankfulness for someone's actions or presence. 
If it weren't for your help, I wouldn't have finished the project on time.