It'd is a spoken form of `it had', especially when `had' is an auxiliary verb. Marcie was watching the news. It'd just started. the short form of 'it would' or 'it had'
You'd is the usual spoken form of `you had', especially when `had' is an auxiliary verb. I think you'd better tell us why you're asking these questions
Türkisch - Englisch
Definition von it'd im Türkisch Englisch wörterbuch