One of the prepositions that takes the genitive case is из, which means ‘from’. But not all froms are created equal in Russia. Let's start thinking about to/from/at in Russian like this. There are three words for to, three words for at, and three words for from. And they are related, roughly speaking, like this:

So if you go to a place using в, and you are at that placе using в, then you come back from it using из. That applies to most cities and countries and places of business:

These aren't the only contexts which require из, but it's a good start to keep them in mind.

One of the words for you in Russian is ты, which is declined like this:

Ты, of course, is the singular form of ‘you’ that is used when talking to someone you don't have to be more formal and polite with. You can use it when talking to a child. You can use it when talking to a pet. You can use it when you are talking to a brother or a sister. You can use it when talking to one person whom you know well. So, if you suddenly spot someone walking down the street, and you know that person very well, you might say:

In contrast to ты the word вы is used to talk to a single individual when you are speaking more formally. Mastering when to use ты and вы is a bit problematic for American English speakers for several reasons. The obvious reason is that there is only one word for you in English. Previously the general rule for non-Russian speakers of Russian was that one should use вы until a particular Russian suggests otherwise to you. That's not the worst rule on the planet. But nowadays the transition from вы to ты is taking place much more rapidly than previous generations could have dreamed of. Nonetheless, I am still advising my students to start with вы with anyone older than them, and then allow the Russians to suggest making the change when it suits them. If you are a college age or highschool age American talking to a Russian who is the same age as you, go for it and use ты right away.

One last comment. You may have noticed that the instrumental case has two different forms. The more common one is тобой, so that should be your first choice in speech. But if you are ever writing poetry in Russian and need to have an extra syllable in the line, feel free to use тобою.

The word право means right in the sense of “the right to do something”. In the singular it is stem-stressed, and in the plural it is end-stressed.

The word means right both in the sense of moral rights and legal rights:

If you combine the noun with водительский in the plural, then the phrase means driver's license.*

* In Arizona, at least, the official phrase is “driver license”, but normal human beings say “driver’s license”.

The word нельзя means “it is forbidden”. In this sense it is used with imperfective verbs:

If you mention the person who is not allowed to do something, that person goes in the dative case:

Нельзя can also mean “it is impossible”. In that sense it is used with perfective verbs:

The word милый in its various forms means sweetheart, dear, darling. It's used as a term of affection between boyfriends and girlfriends, among family members and close friends.

The adjective can also be used in a diminutive form, миленький, which is particularly well known in the folk song «Миленький ты мой». Here is the song and the translation: