(9) Which is correct - 'Looking forward to speak with you' or 'Look forward to speak with you'? - Quora

(9) Which is correct - 'Looking forward to speak with you' or 'Look forward to speak with you'? - Quora

Neither. It would be either "Look forward to speaking with you" or "Looking forward to speaking with you." The "to" in the sentences functions as a real preposition, not the pro forma "to" that comes before an infinitive.

Note that "looking forward" is a phrasal verb, based on two category-forming ideas common in English. To look, metaphorically, is to attend to or be aware of, and forward is where the future is. Technically, it means "anticipate," but it has also, idiomatically, achieved a positive connotation.

Neither is formal English, and both omit words, which I'm putting here in brackets.

[I] look forward to speaking with you.
[I am] looking forward to speaking with you.

It isn't very common to omit these words in English (unlike, say, Spanish), but it can be done in friendly situations when the meaning is clear. "Look forward to" is a bit preferable, because it feels more active, but both are acceptable.

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