A diferença entre "will" e "going to" reside na intenção e certeza: "going to" é usado para intenções e planos já estabelecidos, ou para previsões baseadas em evidências atuais, enquanto "will" é mais associado a decisões instantâneas, promessas, ofertas e previsões baseadas em opinião pessoal.

Will

Affirmative

sujeito + will + verbo principal no infinitivo + frase

Exemplo:

• They will buy a new house. (Eles comprarão uma casa nova.)
• We will go out tonight. (Nós sairemos hoje à noite.)

Forma contraída: pronome + will = pronome + 'll

• I’ll dance today = I will dance today

Negative

Sujeito + will not + verbo principal no infinitivo + frase

• They will not buy a new house. (Eles não comprarão uma casa nova.)
• We will not go out tonight. (Nós não sairemos hoje à noite.)

Forma contraída: pronome + will not = pronome + won't

• They will not arrive = They won't arrive

Interrogative

Will + sujeito + verbo principal no infinitivo + frase

• Will they buy a new house? (Eles comprarão uma casa nova?)
• Will we go out tonight? (Nós sairemos hoje à noite?)

Going To

Affirmative

Sujeito + verbo to be + going to + verbo principal no infinitivo + frase

• She is going to have lunch with Mary. (Ela almoçará com a Mary.)
• They are going to arrive later today. (Eles chegarão mais tarde hoje.)

Forma contraída: is = 's / are = 're

Negative

Sujeito + verbo to be + not + going to + verbo principal no infinitivo + frase

• She is not going to have lunch with Mary. (Ela não almoçará com a Mary.)
• They are not going to arrive later today. (Eles não chegarão mais tarde hoje.)

Forma contraída: is not = isn't / are not = aren't

Interrogative

Verbo to be + sujeito + going to + verbo principal no infinitivo + frase

• Is she going to have lunch with Mary? (Ela almoçará com a Mary?)
• Are they going to arrive later today? (Eles chegarão mais tarde hoje?)

1. I ______ (visit) my friend next weekend.
2. Look at the sky! It ______ (rain) soon.
3. Don’t worry, I ______ (help) you with your homework.
4. She ______ (buy) a new phone next month.
5. Watch out! You ______ (fall)!
6. I think my team ______ (win) the match.
7. She is tired. She ______ (go) to bed soon.
8. Look at his face! He ______ (cry).
9. Next summer, we ______ (visit) Europe.
10. Don’t worry! I ______ (make) dinner tonight.

Respostas:

1. am going to
2. is going to
3. will
4. is going to
5. will
6. will
7. is going to
8. is going to
9. are going to
10. will