Von den dreien ist "of course" die einzig richtige Version.
"of cause" und "ofcause" sind beide, of course, absolut falsch.

YUK! A second opinon to confirm that Doris is right, only "Of course" is correct.

And a third, to second the first. Only "of course" is possible. You can often use "naturally" in this sense in English, but they are not perfect synonyms due to usage differences.

Agree with all comments. The only thing I could think of is that perhaps someone wrote 'of course' (somewhat) phonetically. It might sound like 'of cause' spoken by someone with a southern accent, especially to a non-native speaker. Of course, you do have the expression, 'of cause' e.g., "of cause and effect", but that's a whole different direction.

Gerade im Internet habe ich schon die schaurigsten Schreibfehler gesehen. Die Leute haben oft keine Ahnung, wie man ein Wort schreibt und schreiben es dann so, wie es sich anhört.

exactly: which should remind everyone of the old saw, "don't believe everything you read". Updated for the Internet age, this becomes: "just because it has 3,000 hits in Google doesn't mean it's correct" (doesn't mean it's not, either; more careful research than just hit-counting is required)

@Peter: Absolut richtig. Ich habe mir deshalb angewöhnt, wenn ich nach der Schreibweise oder Verwendung eines Wortes bei Google suche, auch immer die Gegenprüfung zu machen. Damit bekommt man meistens sehr gute Ergebnisse. Beispiel: Milennium (falsch) 25 500 Treffer; Millenium (auch falsch) 201 000 Treffer, Milenium (immer noch falsch) 62 300 Treffer, Millennium (richtig) 4 390 000 Treffer.

You are all wrong. The real spelling is "of coarse". 87,700 hits on Google.

My question is: who (and where) pronounces "of course" like 'of cause'?? Maybe some of those weird British people? I can't even really imagine that someone with a think Southern US accent would sound like 'of cause'...

@Roy: Wanna hear people say "of cause"? Just call Germany and make them say "of course". Beware not to say "of course" before they do, ohterwise they might accidentally get it right...
After all I'm quite surprised how popular the written "of cause" has become. I imagine manipulating google hitcounts could be much more fun and cause (course) more confusion than creating a new virus or hacking the pentagon...

I was surprised to find that "Roy was kidding" has only 2 hits on Google, where "of coarse" has 87,100 (lost 600 since Roy tried it?). The high hit-count on the latter is a beautiful example of why you can't always just do a blind search on some phrase and use a hit count to prove your point--thanks for that excellent illustration, Roy! (And in case there is anyone who wasn't sure, yes of course Roy is kidding, and he's not saying that "of coarse" is correct.)

:o)

Siss iss off caws a warry interesting discussion! Greetings from Germany!

"Roy was kidding" has only 2 hits on Google because I'm a very serious person. "Roy is serious" gets "about 6" hits. QED.

Hmmm... "of coarse" is up to 92,200 today....

And what are we to make of the fact that "Roy is a great lover" has ZERO hits??!!

Can you say "Firewalled Intranet of Love"???

@BF: you made a very important point with your "Millennium" example about always executing a control search to validate your initial attempt; I wish more people would remember that. @Roy: aahhhh, I knew there must've been a good explanation...

Just noticed this forum does NOT like at-sign, although other ones accept it, as in the same post as the one with the comment to Roy above was this comment *****(at-sign)BF: you made a very important point with your "Millennium" example about always executing a control search to validate your initial attempt; I wish more people would remember that. (at-sign Roy: and so on...)