to do (humble)
Structure
- する → いたす
- お/ご + Verb[stem] + いたします
[This grammar is used when speaking about YOU or YOUR GROUP (like company)]
[There are many exceptions to the ‘YOU’ rule. See examples for more information]
[お attaches to kanji of Japanese origin (kunyomi), while ご attaches to kanji of Chinese origin (onyomi)]
[Expressions that have 「拝」(like 拝見、拝借) don’t take the prefix ご/お since 拝 already performs a similar function. In other words, they are respectful enough already]
Related
運転免許をご拝見いたしますか
Why is ご not accepted here?
Hey 
Expressions that have 「拝」(like 拝見、拝借) don’t take the prefix ご/お since 拝 already performs a similar function. In other words, they are respectful enough already.
By the way, it would be also correct (but less humble) if する was used.
I hope it helps!
Cheers! 
For this sentence:
やる気のある方を、店員として募集いたします。
would this work:
店員として募集いたしています。
One of the example sentences for this grammar point is:
______てもよろしいですか。[Humble 借りる (拝借)]
With the correct answer being:
はいしゃくし
It seems strange that the grammar of いたす gets smushed down to just し here. I would have expected something more along the lines of:
はいしゃくいたし
Can anyone explain what the いた part is dropped here? Thank you!
@golmschenk Hi! Both 拝借しても and 拝借いたしても are acceptable answers here. Since 拝借 is already a humble enough expression it does not necessarily need いたす after it and can use the less humble する. I hope this helps. Cheers!
In one of the examples, it points out the lack of ご being used as an honorific prefix and says it is an exception that needs to be memorized. I also noticed this in another example, where ご出発 was not accepted because it means the customer is departing instead of the company’s train. These link here, and tell you to read it for an explanation of the exceptions, but the linked post doesn’t seem to mention anything about it.
What is the main difference between this and お＋stem＋する, as learned in lesson 9 of N4?
Came here to ask a similar question to @DarkConfidant .
I saw 募集する and the prompt was “humble / polite” so I tried お募集します. It was incorrect and I was given 募集いたします as the right answer.
Moments before I had the opposite happen with 電話する.
How do you know when する will go one way and when it will go the other?
I have the same question as @DarkConfidant and @rwmleach, I keep getting answers wrong as sometimes お＋stem＋する is the answer and othertimes いたす。
Is there a trick to this that we’re missing?
The difference is explained in a comment in this thread by @mrnoone; it’s also linked at the top of this thread. Is there anything else that’s unclear?
Regarding 募集 specifically, note that the example sentence with 募集 has an orange note that this is one of the exceptions where ご (not お) is not used.
The explanation in that thread makes sense for the examples given, because there is context of office hierarchy and who is involved in the conversation.
But here are example sentences from the grammar points in Bunpro:
“I will wait in front of the station. [humble]”
“We will send the merchandise tomorrow. [humble]”
“I (will) humbly close the door.”
“I humbly borrowed a computer from my friend’s mother.”
The first two are いたします, the last two are お〜する. Without any context other than this prompt, I don’t see the difference.
The link you gave says お〜する “has the nuance that you show respect to the person you are talking about”. But if “I” will close the door or borrow a computer, aren’t I talking about myself?
So I guess really what @DarkConfidant, @Senaki and I are probably missing is something in the prompt like “you are talking to your boss” or “you are talking about your boss”.
Unless you can clarify how you can tell which form goes with “I will wait in front of the station” and which goes with “I will close the door” just with that alone?
I tried these questions with cram. The する ones seem to accept いたします as correct with no further comment. The いたす ones don’t accept します but the answer isn’t marked incorrect; I was only asked to make it even more polite (which is an obvious hint that I should use いたします).
In other words, simply choosing the wrong option will mostly not result in being marked wrong. But these things can:
For some reason, the いたす questions only seem to produce an orange warning for wrong prefix + いたす. In a way it makes sense because they’re saying “at least you remembered いたす,” but I think it’s also logical that believing an honorific prefix to be appropriate would lead to attempting to answer with する, so it’s kind of the same mistake…
I agree that sentences like these are difficult to interpret without context. “I’ll close the door” is such a basic thing that I wouldn’t even consider using a humble form or even a polite one by default if bunpro wasn’t explicitly asking for one - there isn’t even enough context for that. In these sentences, お+stem+いたす is more or less really just a more polite way to say the same thing as お+stem+する. (Again though, this sentence does actually seem to accept both options…)
I don’t really see a problem with being prompted for a more humble answer by the いたす sentences. It’s not the only grammar point where bunpro does something like this because many things can be said in multiple, equally correct ways. But it would be nice if more sentences where like the one about sending the merchandise, since that one is clearly in a business context where we’re talking to the customer, which is a pretty good hint that we should use いたす if we can.
(Note though that there is an out-of-band hint: The いたす questions want a “[humble]” statement, while the お+stem+する ones want to do things “humbly”.)
まだその映画を はいけんしていない ので、一緒に見に行きませんか。 [Humble 見る (拝見する)]
Where in this answer is the いたす? I have the feeling this sentence should be part of the お~する grammarpoint istead of いたす 
What am i mussing?
You’re missing the note concerning expressions with 拝 near the bottom of the notes. 拝見する is already humble by itself and comparable in that regard to other verbs + いたす.
I came here to look this up too, because I was also confused by this. Thanks for the nudge, @nekoyama!
To cite that note here:
Expressions that have 「拝」(like 拝見、拝借) don’t take the prefix ご/お since 拝 already performs a similar function. In other words, they are respectful enough already
For me, this does not say “also use する for them”, maybe that can be improved upon?
I am confused about the last example “拝借してもよろしいですか。”. Not only does it not use いたす, it also doesn’t use お〜する (I tried putting お at the beginning and it wasn’t accepted).
拝借 is already 謙譲語, there is a note about this in the front of the grammar point entry:
[Expressions that have 「拝」(like 拝見、拝借) don’t take the prefix ご/お since 拝 already performs a similar function. In other words, they are respectful enough already]
I believe you can use いたす with 拝借, but itasu sounds weird in this context with conjugation te-mo, feels like humble よろしい and 拝借 is already being stated here, whether wrong or not I don’t know.
I’m thinking any equivalent term that isn’t an example of the grammar point shouldn’t be included under it. I’ve mentioned before that I believe related, but not direct examples of the grammar point defeat the purpose of spaced repetition by not actually reminding you of what you’re trying to remember. If there are a select few humble equivalents for other words, they should have their own points or otherwise not be included at all. This isn’t a word-learning platform, after all.
For
まだその映画を拝見していないので、一緒に見に行きませんか。
My first thought was 拝見していません or 拝見いたしていません but those were rejected. Is there a reason いない plain negative is required? Is it because of ので?