Could --> Dulu bisa tapi sekarang tidak bisa
Was able to --> Dulu bisa sampe sekarang juga bisa
Would --> Repeated action in the past
I am used to eating hamburger (Habit in present)
I used to eat hamburger (habit in the past, now you don't do that again)
Would rather go.... (True)
Would rather to go.... (False)
Had better go.... (True)
Had better to go... (False)
Necessity
Present (+) | Past (+) |
Have to | Had to |
Present (-) | Past (-) |
Don’t / Doesn’t have to | Didn’t have to |