Cementing My Knowledge of Japanese Adjectives

This post is pretty much just me attempting to remind myself of how to conjugate Japanese adjectives. It's the only section I've really struggled with thus far, so I figure it can't hurt to write out what I've learnt to try and remember it better. So yeah, no need to read unless you want to learn a little Japanese =P

な (na)- adjectives omit the な when coming after a noun. When preceding a noun, however, the な is included. ie: 車は好きです (kuruma wa suki desu) will become 好きなくるまです(suki-na kuruma desu).
な adjectives are conjugated as follows;
Positive - です (desu)
Past - でした　(deshita)
Negative - じゃりません (jarimasen)
Past-negative - じゃりませんでした (jarimasendeshita)

い (i)- adjectives are recognised as always ending in 'i' when positive. There are exceptions (すき and きれい ending in い but actually being な adjectives, for example) but there's no real way to explain or learn that other than plain old memorisation and practice. The い is included both before and after the noun, however it will change depending on conjugation.
Conjugation is as follows;
Positive - い (i)
Past - かった (katta)
Negative - くない (kunai)
Past-negative - くなかった (kunakatta)
Oddly enough, you will usually add です (desu) to the end of each phrase regardless of whether it's in past or present test, or whether it's positive or negative. It's a politeness thing.
So if you were to say your car is not dangerous you would have to include です (desu) at the end despite the sentence being neither positive nor in present tense. ie: あなたの車は危なくなかったです (anata no kuruma wa abunakunakatta desu).

When the adjective is preceding the noun, it's easier to see the adjective + object as one entity rather than two separate words. It makes figuring out sentence structure and speaking fluently easier.