"All things are difficult, before they are easy."
Songs
1. conditional: Bruno Mars - Count On Me
was/were: https://www.youtube.com/watch?v=KAsacxmPh1Q, https://www.youtube.com/watch?v=UuxQV0kzo5o
Present perfect: U2-I Still Haven't Found What I'm Looking For
Used to: Sara Bareilles - She Used to Be Mine
Used to: Ramones, Bad Brain https://www.youtube.com/watch?v=WmsYqWXAZgc
Used to: https://www.youtube.com/watch?v=8UVNT4wvIGY