Злой is an adjective that beginners trip over for several reasons. First off, it is so short that it looks funny and they can't really believe that it's not longer:

Very often beginners memorize the word as meaning “wicked.” That's true as far as it goes:

However the word very often just means “mean” or “angry”:

The Russian word for Christmas is Рождество, which comes from the verb родить “to give birth.” Here we have the text of the angels' message to Joseph (Matt 1:18-21). The text on the left is from the Russian Synodal Bible, which uses pre-revolutionary spelling. The text on the right is from the King James Bible.

The word for not in Russian is не. It can be used to negate nouns, verbs, prepositional phrases, and most other parts of speech:

When you want to contrast something by first saying what it is not, you then use the conjunction «а» to introduce the thing it is:

When не negates a verb, it is pronounced with the verb as a single word and is almost always unstressed, which means it's pronounced [ни] not [не]. Thus «я его не знаю» “I don't know him” is pronounced [я йиво низнаю]. There are a few exceptions where the не becomes stressed when negating a verb, and of those it's particularly important to know that when the past tense of быть is negated, the не becomes stressed and the быть form becomes unstressed. This happens in all past быть forms except the feminine:

The word я ‘I’ is a personal pronoun that declines like this:

In American English there are a couple of problems with the word ‘I.’ First off, in conversational English we often say ‘me’ where we should say ‘I’ in the literary language. Thus kids often say things like “Me and John went to the store” or “It's me” when theoretically we should say “John and I” or “It is I.” The Russians never make that mistake. They always use subject/nominative form in the right place:

Other examples:

¹ Although this sentence is theoretically okay, the Russians usually say it differently. We'll address the better usage in an upcoming entry on the word мы.
² Although theoretically one should say “It is I” in this context, no normal American will do so. Only pedants say “It is I.”

The word он is a personal pronoun that declines like this:

The «н» versions of the pronoun occur when the pronoun is the object of a preposition.

Он refers to masculine singular nouns, which can be either people or things, so sometimes it is translated as he/him, and sometimes it is translated as it. In other words, if you are refering to a врач doctor, then the sentence must be translated with he/him, and if you are refering to a грузовик truck, the same sentence must be translated with it:

In casual conversation it's common in America to say things like “Me and John went to the store,” especially when we are children. Schoolteachers then try to beat us out of that habit and make us say “He and I went to the store.” Because of that influence, English speakers may be tempted to say things like «Он и я ездили в магазин» in Russian. While theoretically one can say that in Russian, no one ever does. Instead it gets rephrased as “we with him” «мы с ним». Of course, it would be ridiculous to translate that as “we with him” in English; you still want “he and I” or just plain old ‘we.’