feat: Improvements; Add verbs

docs/Grammar/Cases/Accusative.md

@@ -1,5 +1,11 @@
+---
+sidebar_position: 2
+---
+
 # Accusative
 
+## When to use the accusative case
+
 * Direct object of a verb
 
 ### Nouns

docs/Grammar/Cases/Dative.md

@@ -1,5 +1,11 @@
+---
+sidebar_position: 3
+---
+
 # Dative
 
+## When to use the dative case
+
 * Indirect object of a verb
 
 I give you flowers -> "you" is dative

docs/Grammar/Cases/Genitive.md

@@ -1,11 +1,22 @@
+---
+sidebar_position: 4
+---
+
 # Genitive
 
-* Amount
+## When to use the genitive case
+
+1. When you're talking about **amounts**
     * One cat, two cats, five cats
     * Один кот, два кота, пять котов
-* Negation
+2. For **negations**
     * There is no cat
     * Нет кота
+3. When you're talking about **possession**
+    * This is my cat
+    * Это мой кот
+    * My friend's cat
+    * моего друга Кот 
 
 ## Nouns
 

docs/Grammar/Cases/Instrumental.md

@@ -0,0 +1,56 @@
+---
+sidebar_position: 6
+---
+
+# Instrumental
+
+## When to use the instrumental case
+
+1. To indicate the means by which an action is performed.
+    * I write with a pen
+    * Я пишу ручкой
+2. To indicate the person or thing with which something is done
+    * I go with my friend
+    * Я иду с другом
+
+## Nouns
+
+### Singular
+
+| Masculine                     | Feminine                          | Neutral                 |
+|-------------------------------|-----------------------------------|-------------------------|
+| (ends in consonant) -> add -а | (Г, К, Х, Ж, Ч, Ш, Щ) + -а -> -и (otherwise) -а -> -ы |                         | 
+| -й -> -я                      | -ь -> -и                          | о -> а                  |
+| -ь -> -я                      | -я -> -и                          | е -> я                  |
+|                               |                   | мя -> мени                       |
+
+### Plurals
+
+| Masculine                  | Feminine                                              | Neuter   |
+|----------------------------|-------------------------------------------------------|----------|
+| (ends in consonant) -> -ов |                                                       |          |
+| (ends in ж, ч, ш or щ) -> -ей |                                                       |          |
+| -й -> -ев                  | -а -> -                                               | -о -> - |
+| -ь -> -ей                  | -я -> -ь                                              | -е -> -ей |
+|                            | -ия -> -ий                                             | -ие -> -ий |
+|                            | -ь -> -ей                                              |          |
+
+
+## Examples
+
+I don't have a cat
+
+У меня нет кота
+
+(У меня, нет, кот)
+
+---
+
+This is the door of the house
+
+Это дверь дома
+
+(Это, дверь, дом)
+
+
+

docs/Grammar/Cases/Nominative.md

@@ -1,3 +1,7 @@
+---
+sidebar_position: 1
+---
+
 # Nominative Case
 
 * Base form of a noun

docs/Grammar/Cases/Prepositional.md

@@ -1,5 +1,11 @@
+---
+sidebar_position: 5
+---
+
 # Prepositional
 
+## When to use the prepositional case
+
 Use it after:
 
 * В

docs/Grammar/Verbs/Special_Verbs.md

@@ -0,0 +1,14 @@
+# Special Verbs
+
+## отвечать / ответить
+
+to answer, to respond
+
+отвечать + на + <[accusative](#Accusative)>
+
+## Играть
+
+to play
+
+see [Играть](to_play.md)
+

docs/Grammar/Verbs/to_have.md

@@ -0,0 +1,12 @@
+# To have
+
+To say "I have [...]" in Russian, you literally say: "At me is [...]"
+
+* У **меня** есть [...] (I have ...)
+* У **тебя** есть ... (You have ...)
+* У **него** есть [...] (He has ...)
+* У **нее** есть [...] (She has ...)
+* У **нас** есть [...] (We have ...)
+* У **вас** есть [...] (You (plural / formal) have ...)
+* У **них** есть [...] (They have ...)
+

docs/Grammar/Verbs/to_play.md

@@ -0,0 +1,23 @@
+# Играть
+
+## Играть + на
+
+Use this form when you are talking about playing an instrument.
+
+Form: играть на + [prepositional case](#Prepositional.md)
+
+### Examples
+
+- Я играю на гитаре. (I play the guitar.)
+- Ты играешь на пианино. (You play the piano.)
+- Он играет на скрипке. (He plays the violin.)
+
+## Играть + в
+
+Use this form when you are talking about playing a game or sport.
+
+Form: играть в + [accusative case](#Accusative.md)
+
+### Examples
+
+- Я играю в футбол. (I play football.)