HELP!!!! Can someone tell me why i got wrong?

Prepositional phrases are difficult in any language. My second language is Spanish... I have learned to just memorize which preposition goes where and not ask questions.

I don't think there is any logical reason that "for" is preferable to "in" in this case. It just is because that is how English is used.

a predicate adjective usually precedes the "in + -ing" construction. here, there's a noun. nouns generally precede the "for + -ing" construction

he is interested in teaching, as opposed to he has a passion for teaching

this isn't an absolute rule, but it's generally correct.

He has a love of teaching.

These are all idiomatic. I think trying to teach rules for prepositional phrases is folly.

You just have to memorize them.

I am curious Angus. What is your native language?

If it is Spanish... I promise you that the prepositions in Spanish (por, para, de, en) are at least as difficult as they are in English.

i disagree. English isn't my first language either, and learning rules has always helped me learn idiomatic phrases. when i started learning Spanish, rules also helped. it's helpful knowing that por's used when discussing a length/period of time, even if that's far from its only use. i don't see how you can say it's folly.

We can agree to disagree then. But my experience says you are wrong. I have experienced this from both sides.

I have spent some time helping English language learners. They are being taught rules. They ask me about the rules. I have to tell them, honestly, that I have never learned these rules in English... I just speak the way that I speak. Native speakers never learn these rules... nor do they know the rules if you ask them about them. A friend came to me with a list of phrasal verbs. I had to look up what a phrasal verb was (I use them all the time, but I never had to learn what they were.)

I have had the same experience learning Spanish. I would say... why is the subjunctive case used in this example. They native speaker would say "what is the subjunctive case?" (this has actually happened exactly this way a couple of times with different people). Then I would say... in this case you say "habla" but in this case you say "hable", why? And they would say because that's the way we speak.

If you speak a language fluently, you need to be able to construct sentences by rote. This means you memorize how words are used. That is the way native speakers of a language speak their language.

When I am talking about living at a place for a week... I am never going to think about whether this is discussing a length/period of time. When I am talking in English I don't ever consider the rules. I don't have to. More and more this is true when I speak Spanish as well. I just say what I am thinking.

I am not saying the rules are never useful when learning a new language. But I am saying that when you speak a language fluently, you are using memorized patterns rather than rules.

And, often the rules are wrong.

I never said otherwise but when a person first starts learning a language they identify patterns and rules similar and different from their L1 to help them make the appropriate adjustments. Obviously if someones fluent they wont usually think about rules. I didnt know the pattern I mentioned. I thought about it only for the usefulness of the question asker, who hasnt internalized these idiomatic phrases yet and needs help so eventually he can.