Exercises

EXERCISES

I.- Write the correct form of the verb in the chart according to the tenses given.
Present/ Past/ Past Participle/ Meaning

-Bring/ Brought/ Brought/ Traer

-Make/ Made/ Made/ Hacer

-Fix/ Fixed/ Fixed/ Arreglo

-Do/ Did/ Did/ Hacer

-Have/ Had/ Had/ Tener




II.- Write the correct form of the verb with the right tense.
1.- My father ___________ Wil Use_______(use) this equipment for a long time tomorrow.
a) Future

2. - Dr. Albert Einstein____Explained____ (explain) how atomic energy can be released many years ago.
c) Simple past

3.- Engineers sometimes______Rewrite_____ (rewrite) the project before discussing it .
a) Simple present

4.- The students _________Will give________ (give) the result to the teacher next Friday.
a) Past progressive

5.- The company ______Is changing______(change) the equipments in all department now.
c) Present progressive

6.- The mechanic ____Broke____(break)the internal pieces in that washing machine yesterday
a) Simple past

7.- Civil engineer ___Have mixed__ (mix) all the substances to make a special concrete lately.
a) Present perfect


III Change these sentences to questions using the auxiliaries “Do” or “Does”

1.-A generator uses magnets to produce an electric current.

-Does a generator uses magnets to produce an electric current?

2.-They accept data and instructions as input and after processing the information the supply
the results as output.

-Do they accept data and instructions as input and after processing the information the supply the results as output?

3.-The normal heart beats about 37,000,000 times a year.

-How many times a year does a normal heart beat?


4.- Did Transformers transmit electrical power all day when they exploded?

- Do transformers explode when they transmit electrical power all day long ?

IV Answer these questions
1.- Did Romans build many stone bridges in all Europe?

-Yes, he build many stone bridges in all Europe.
-No, he didn´t build stone bridges in all Europe.

2.- Did your father Fix his house last night?

-Yes, he fix his house last night.
-No, he didn´t fix his house last night.

3.- Did men experiment with the electrical current during the latter half of
the nineteenth century?

- Yes, he experiment with electrical current during the latter half of the nineteenth century.
- No, he didn´t experiment with electrical current during the latter half of the nineteenth century.

4.- Did Transformers transmit electrical power all day when they exploded?

-Yes, they transmit electrical power all day when they explode.
-No, they don´t transmit electrical power all day when they explode.

V Complete these present or past progressive sentences.

1.- The new aircraft __________mantained_________ (maintain) the speed right last night.
2.- In this experiment, the sunlight_________pass_________ (pass) through a small hole in the wall at that moment.
3.- Transformers ____transmited______(transmit) electrical power all day when they exploded yesterday
4.- They _______organized_____(organize)the electrical devices while we were cleaning them.