"thank you" + infinitive

[Alexzive]

Hi there!

I have some doubts regarding infinitive "thank you" sentences:

which of the following alternatives are correct?

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Many thanks having joined us

or

Many thanks FOR having joined us

----------------------------------------
Thank you having joined us

or

Thank you FOR having joined us

or maybe are infinitive "thank you" sentences never used?

Thanks!!!
Alex

[Yankee]

Hi Alex

Thanks for having joined us is correct.
(You need the word for.)

You could also say:
Thanks for joining us.
(I think this sounds more natural.)

Amy

[Tamara]

...Opening the thread, I was actually expected to see 'thank you' + infinitive...
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