El infinitivo representado por su «to»

Un infinitivo puede estar representado por «to» solamente para evitar la repetición. Esto ocurre principalmente después de verbos como hate, hope, intend, would, like/love, make (pasiva), mean, plan, try, want, después de los auxiliares have, need, ought, y con used to, be able to, y la forma be going to:

• Would you like to come with me? – Yes, I’d love to.
• Did you get a ticket? No, I tried to, but there weren’t any left.
• Why did you get a taxi? I had to (take one). I was late.
• Do you ride? – Not now but I used to.
• He wanted to go but he wasn’t able to.
• Have you fed the dog? – No, but I’m just going to.