Как образуются утвердительные предложения в present simple.

Если подлежащее стоит во множ. числе или является местоимениями I you we they, то после них используется глагол в начальной форме без частицы to 
например, We play tennis (глагол без окончаний)
если подлежащее стоит в ед. числе или является местоимениями he she it , то у глагола добавляется окончание s
например, She playS tennis

1. are singing -  сейчас -Present Continuous
2. buy -     обычно -Present Simple
3. is drinking - сейчас -Present Continuous
4. are walking - сейчас -Present Continuous
5. is laughing  - сейчас -Present Continuous 
6. is playing  - сейчас -Present Continuous
7. wear  -обычно -Present Simple
8. eats  -обычно -Present Simple
9. are sleeping  - сейчас -Present Continuous
10. do you go  -обычно -Present Simple
11. never eat  -обычно -Present Simple
12. don't like  -обычно -Present Simple
13. are you doing  - сейчас -Present Continuous
14. is walking  - сейчас -Present Continuous

We teach English because we will need it in the future.We can become managers of large institutions, so that we can communicate with foreign visitors to the us should learn English.You can even just traveling to meet an Englishman.
London looks great!Everyone wants to visit it,but for this we need the English language.Another situation for which we need English language: for example,we want to buy a car,but now we are traveling to London-we need English.Itself
English is a great language!Diction tempore of the voice in this beautiful language!Fine sounding words from the lips of the Englishman.
It was my opinion.