The document discusses the present and past forms of the verb "to be" in English. It provides the affirmative, negative, and interrogative forms of "to be" for the present and past tenses. It also notes that abbreviated forms such as "I'm", "'re", and "'s" are commonly used in conversation. For the past tense, the forms are only "was" and "were". It provides examples to complete using the correct form of "to be" in the present or past tense.

1. 9) Verbo To Be – Presente e Passado
Afirmativa Negativa Interrogativa
I am I am not am I?
you are you are not are you?
he is he is not is he?
she is she is not is she?
it is it is not is it?
we are we are not are we?
you are you are not are you?
they are they are not are they?

2. Em conversação é comum o uso de formas abreviadas:
Afirmativas: ‘m = am ‘re – are ‘s = is
Negativas: - aren’t = are not isn’t = is not
Passado: as formas do passado (pretérito perfeito ou
imperfeito) do verbo to be são apenas duas: was e
were.
Afirmativa Negativa Interrogativa
I was I was not was I?
you were you were not were you?
he was he was not was he?
she was she was not was she?
it was it was not was it?
we were we were not was it?
you were you were not were you?
they were they were not were they?

3. No passado, só as formas negativas são abreviadas:
Wasn’t = was not weren’t = were not
Complete com as formas adequadas do verbo to be, no
presente e/ou no passado.
1. Global warming _________ the most urgent problem
facing human civilization today.
2. Many tropical plants ___________ in danger because of
deforestation.
3. Winston Churchill _________ prime minister of Great
Britain during the Second World War.
4. It __________ a tiring flight, but we _________ now
spending four days in the Amazon!
5. Gases from cars, trucks and buses _________ a big
source of pollution.

4. Complete com as formas adequadas do verbo to be,
no presente e/ou no passado.
1. Global warming is / was the most urgent problem
facing human civilization today.
2. Many tropical plants are / were in danger because of
deforestation.
3. Winston Churchill was prime minister of Great Britain
during the Second World War.
4. It was a tiring flight, but we are spending four days in
the Amazon now!
5. Gases from cars, trucks and buses are / were a big
source of pollution.