Question

Complete the sentences with while or when
A: Did you hear the news
you were having
lunch at the pub? A terrorist attacked people at the
Westminster Bridge and tried to invade the Parliament
B: No, we heard the news
we were near the
London Eye, on the other side of the bridge
As Oh, Gosh! What did you do
you heard the
news?
B: At first, we didn't realize what was happening.
we tried to cross the bridge back to
Westminster and walk to the hotel, police officers didn't
allow us to do it
A: And how did you go back to the hotel, then?
B: We had to walk to Waterloo and take the tube there
Rescue helicopters were flying over
we were
walking along the Thames. It was very frightening.​

Answer 1

Resposta:

⇒⇒  While

⇒⇒ When

A: Did you hear the news  when you were having  lunch at the pub? A terrorist attacked people at the  Westminster Bridge and tried to invade the Parliament

B: No, we heard the news  when we were near the  London Eye, on the other side of the bridge

A: Oh, Gosh! What did you do  when you heard the  news?

B: At first, we didn't realize what was happening.  When we tried to cross the bridge back to  Westminster and walk to the hotel, police officers didn't allow us to do it.

A: And how did you go back to the hotel, then?

B: We had to walk to Waterloo and take the tube there. Rescue helicopters were flying over  while we were  walking along the Thames. It was very frightening.​

Explicação:

→→  When >>> quando >> usado para ligar duas frases: uma no past continuous e outra no simple past, ou seja, para falar sobre uma situação que estava acontecendo no passado enquanto outra aconteceu ao mesmo tempo.

was/were + verbo -ing  + verbo passado

I was sleeping when the phone rang. > Eu estava dormindo, quando o telefone tocou.

David was driving when he saw Helen. > David estava dirigindo quando ele viu a Helen.

→→ While >>> enquanto >> usado para ligar duas frases  no past continuous, ou seja, para falar sobre uma situação que estava acontecendo ao mesmo tempo de outra situação.

was/were  + verbo -ing + was/were + verbo -ing

I was cleaning the living room while Jennie was washing the dishes. > Eu estava limpando a sala enquanto a Jennie estava lavando louça.

John was working while his kids were playing soccer. > John estava trabalhando enquanto seus filhos estavam jogando futebol.

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Answer 2

A: Did you hear the news      while       you were having lunch at the pub? A terrorist attacked people at the Westminster Bridge and tried to invade the Parliament!

B: No, we heard the news      when    ​ we were near the London Eye, on the other side of the bridge.

A: Oh, Gosh! What did you do    when ​ you heard the news?

B: At first, we didn’t realize what was happening.  

    When​         ​we tried to cross the bridge back to Westminster and walk to the hotel, police officers didn’t allow us to do it.

A: And how did you go back to the hotel, then?

B: We had to walk to Waterloo and take the tube there.

Rescue helicopters were flying over     while   ​ we were walking along the Thames. It was very frightening.