What is the correct choice?
He accepted the invitation and looked / looking forward to the visit.

Question

Answer

Hi!
I think "He accepted the invitation and is looking forward to the visit." sounds the most natural.
Hope this helped!

Answer

I think these two are ok: 
"He accepted the invitation, looking forward to the visit" (not 100% sure on this one)
and
"He accepted the invitation and looked forward to the visit"

Answer

If it's connected to the present you could say:

1) He has accepted the invitation and is looking forward to the visit.

If it's strictly in the past (finished actions):

2) He accepted the invitation and was looking forward to the visit.

We tend to say 'looking forward to'  in a more informal way and 'look forward to' in a formal situation, such as at the end of a business letter/email/job application.

Example: I look forward to hearing from you (at your earliest convenience).

So it's really a matter of formality.

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