Postby thegooseking » May 13th, 2014 8:46 am
satorimarikaさん、
The first one requires the particle に because 欠席する is not a transitive verb. You can't "be absent something"; you can only "be absent from something" - it's the same in Japanese. The に marks the indirect object, not the direct object. In English, transitive verbs are verbs that can take a direct object, which means that the object follows the verb without needing a preposition in between. But in Japanese, there is always a particle between the object and the verb. Generally speaking, transitive verbs take the particle を and intransitive verbs take some other particle, usually に (although there are a couple of exceptions in both cases).
For the second word, 遅刻, the same applies. You're normally "late for something", and not "late something". So the something is an indirect object, and takes に.
I'm not entirely sure what the difference between 遅刻する and 遅れる is. As before, though, it takes に because it's an intransitive verb (what you're late for is the indirect object).
(When I said it's the same in Japanese, it's not exactly the same, because in English, 'late' and 'absent' are adjectives, while in Japanese, 'to be late' and 'to be absent' are verbs. But I think any Japanese verb that would be translated into English as "to be [adjective]" will probably be intransitive... Though there probably are exceptions!)
In all three cases, you can omit the subject if it's obvious. It's generally safer to say who is absent or late, but it's more natural not to if it's clear from the context. In conversation it doesn't matter so much, because the person you're talking to can always ask for clarification if they need it, but in writing or formal speech you of course need to be more careful. You will sometimes hear Japanese people putting the subject at the end of the sentence. This can be used deliberately to emphasise the subject, or it can simply be because they started the sentence omitting the subject and then realised that the subject isn't actually that obvious.
I hope that helps.
小狼