3 - Practice Formal and Informal Greetings and Expressions according to each of the following situations. Choose expressions from the Useful Language box on Exercise 2 to complete the bubbles.

a) Friends meeting on the street.

b) Work colleagues introducing themselves.
c) Introducing yourself during a presentation a work

d) Friends checking on each other​

car: carro

cars: carros

girl: garotas

bag: bolsa ou mochila

boys: meninos

toys: brinquedos

Verbo to be 
i am (eu sou, estou) 
you are (você é, está) 
she is (ela é, está) 
it is (ele/ela é, está para coisas ou animais) 
we are (nós somos, estamos) 
you are (vocês são, estão) 
they are (eles são, estão) 

forma negativa 
i am not 
you are not 
he is not 
she is not 
it is not 
we are not 
you are not 
they are not 

forma interrogativa 
am i?  
are you?  
is he?  
is she?  
is it?  
are we?  
are you?  
are they?  

afirmativo 

you are a student (você é um estudante). 
they are students, too. (eles são estudantes, também). 
we are brazilian. (nós somos brasileiros). 
mr. smith is in the office. (sr. smith está no trabalho). 

negativo 

we aren't in canada now. (nós não estamos no canadá agora). 
i'm not a teacher. (eu não sou um professor). 

interrogativo 

are they inteliggent? (eles são inteligentes? ) 
am i brazilian? (eu sou brasileiro? ) 
who am i? (quem sou eu?

Once upon a time there was this girl, how didn,t wanna to do her homerwork, so she have this amazing idea! she was to this site and ask for someone do it for her, so she could be doing a lot of  nothing. so teacher, if you are reading this, do not give her note. because she really don't  deserve. and then they live happy forever.

the end!

1st - first 
2nd - second 
3rd - third 
4th - fourth 
5th - fifth 
6th - sixth 
7th - seventh 
8th - eighth 
9th - ninth 
10th - tenth 
11th - eleventh 
12th - twelfth (see also: "twelfth") 
13th - thirteenth 
14th - fourteenth 
15th - fifteenth 
16th - sixteenth 
17th - seventeenth 
18th - eighteenth 
19th - nineteenth 
20th - twentieth 
21st - twenty-first 
22nd - twenty-second 
23rd - twenty-third 
24th - twenty-fourth 
25th - twenty-fifth 
26th - twenty-sixth 
27th - twenty-seventh 
28th - twenty-eighth 
29th - twenty-ninth 
30th - thirtieth 
40th - fortieth 
50th - fiftieth 
1st - first 
2nd - second 
3rd - third 
4th - fourth 
5th - fifth 
6th - sixth 
7th - seventh 
8th - eighth 
9th - ninth 
10th - tenth 
11th - eleventh 
12th - twelfth 
13th - thirteenth 
14th - fourteenth 
15th - fifteenth 
16th - sixteenth 
17th - seventeenth 
18th - eighteenth 
19th - nineteenth 
20th - twentieth 
21st - twenty-first 
22nd - twenty-second 
23rd - twenty-third 
24th - twenty-fourth 
25th - twenty-fifth 
26th - twenty-sixth 
27th - twenty-seventh 
28th - twenty-eighth 
29th - twenty-ninth 
30th - thirtieth 
40th - fortieth 
50th - fiftieth 

faça com o 30,quarenta e 50 como está o exemplo do 20 (apenas mude a primeira palavra! )