Auxiliary verbs
We use be, have and do to form tenses, questions and with negative forms. When be, have and do are used in this way they are called auxiliary verbs.
Be
We use be + verb in ing form to form the continuous tenses:
Present continuous – He is working in Italy at the moment.
Past continuous – He was working in a hotel when I met him.
Have
We use have + past participle to form the perfect tenses:
Present perfect – She’s been here for three months.
Past perfect – The film had already started when we got there.
Do
We use do in simple tenses for questions and negative forms:
Do you know John?
I didn’t get your e-mail.
Complete the questions with the correct forms of DO, BE or Have.
1. ___ Carl ever been involved in a fight?
the answer: Has Carl ever been involved in a fight? – Czy Carl kiedykolwiek uczestniczył w bójce?
2. What ___ an appropriate birthday present for my five-year-old nephew?
the answer: What is an appropriate birthday present for my five-year-old nephew? – Jaki jest adekwatny prezenta dla mojego pięcioletniego dziecka?
3. ___ doctors need to be good at maths?
the answer: Do doctors need to be good at maths? – Czy lekarze muszą być dobrzy z matematyki?
4. Why ___ Kelly so miserable today?
the answer: Why is Kelly so miserable today? – Czemu Kelly wygląda dzisiaj na tak zdezelowaną?
5. Which sports ___ you keen on?
the answer: Which sports are you keen on? – Jakie sporty Cię interesują?