feat: add englis class 4

Areas/upv/classes/ingles-especialidad/04-class.md

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+# Class 04
+
+*If + will $\rightarrow$ (yes/no)?*
+
+**Yes** 
+$\rightarrow$ for formal requests
+$\rightarrow$ willingness
+$\rightarrow$ disapproval of a habit
+
+[Will and Would](https://www.englisch-hilfen.de/en/grammar/will_would_if_clauses.htm?msclkid=062b35e9aab411ec8fc0dfbb110b86f7)
+
+## Homework
+
+**1.**
+
+1:ab
+2:a
+3:b
+4:b
+5:ab
+6:(a)b
+
+**2.**
+1:will buy
+2:there are
+3:pay
+4:Would
+5:dont want
+6:didn't have to
+7:we'd be
+8:will be
+9:would you go
+10:lose
+
+**3.**
+A: would happen, ~~would join~~ joined 
+B: would be
+A: would, do
+B: would'nt be able, ~~would have to~~ had to
+A: ~~would~~ owned, ~~would~~ came, ~~Would~~ 'd give
+B: ~~wants~~ wanted
+A: I'd be
+B: would'nt clouse
+
+**4.**
+
+1. ~~will~~ i'll buy
+3. sound
+4. ~~would have to~~ had to
+5. ~~are~~ would'nt be
+7. ~~would~~ looses
+
+
+**Test 6 (Page 67)**
+
+1 $\rightarrow$ e **0**
+2 $\rightarrow$ c **2.**
+3 $\rightarrow$ d **1.**
+4 $\rightarrow$ a **2.**
+5 $\rightarrow$ b **1.**
+
+
+**Test 7 (Page 68)**
+
+1. We are only goinfg to bid if we can afford it
+2. If the bid has gone too high we will look for another gift.
+3. If wer foing to limit our spending...
+4. If we can't find exactly what we want, we're not going to buy anything.
+5. We won't buy anything unless we find the perfect gift.
+6. If someone already bought it, we can not buy it.
+7. You'll have to let me use your card if mine declines.
+8. if we havent found anything in an hour, we will look somewhere else.
+
+# 6.4 -> 2
+1. Whats the customers enquiry about?
+
+His bill and why it is higher than expected
+
+2. What are the two tarrifs mentioned?
+
+**Basic** 
+Less minute, but with overcharge fees.
+
+**Unlimited**
+More Minutes, more free calls more data use, more expensive
+
+ 3. What does the customer decide to do?
+
+Upgrade to the unlimited tariff.
+
+
+# 6.4 -> 3
+
+# 6.4 -> 6
+
+incredibly, amazingly
+very totally
+really,
+completely, absolutely
+
+# Homework
+
+Activities 5,6,7 -> Page 151

Areas/upv/classes/ingles-especialidad/conditionals.md

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+# Zero Conditional
+
+When something is generally true. 
+
+*If my room is dirty, i will clean it.*
+
+# First Conditional
+
+When something may happen in the future.
+
+# Second Conditional
+
+Impossible things in the present and unlikely things in the future.
+
+# Third Conditional
+
+Things that did not happen in the past and their imaginary results.

Areas/upv/classes/ingles-especialidad/glossary.md

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+# Extreme Adjectives
+
+*Example:*
+apalling, terrible, awfull, useless
+
+We cannot use certain modifiers with extreme adjectives.