Easy Phrasal Verbs: Learn English verbs through conversations


have come from (present perfect)



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[@Books Encyclopedia] Easy Phrasal Verbs

18.4 have come from (present perfect)

18.4.1 Ali is studying about medicine with his teacher.

Teacher:  Throughout  human  history  a  large  number  of  medicines  have

come from plant extracts.

Ali: For example?

Teacher:  Aspirin,  for  example.  And  many  anesthetics  that  are  used  in

surgery.


Ali: What’s an anesthetic?

Teacher:  It’s  a  medicine  which  makes  you  unconscious  so  that  you  can

have an operation without feeling pain.

18.4.2 Gabriel and Adam are talking about inventions.

Gabriel: I think the best invention ever is the television.

Adam: I think it’s the airplane.

Gabriel: I think you have to be a genius to be an inventor.

Adam: I’m not sure. I think the best inventions in history have come from

hard thinking and hard work.






Exercises

Fill in the blanks in the following conversations using the correct form of “come from”:

1.

A: Is this medicine man-made?

B: Yes, it is. But it originally ______ a plant extract.

A: Which plant?

B: A type of tree that grows in the tropics.

2.

A: My son asked me where babies ______ . I don’t know how to answer

him.

B: How old is he?



A: Five.

B: Maybe you should get him a picture book about it.



3.

A:  Our  knowledge  of  this  ancient  city  ______  the  writings  of  the  Greek

historian Herodotus.

B: When did he live?

A: Over two thousand years ago.

4.

A: Can you hear that strange sound?

B: No. What kind of sound?

A: A strange ringing sound. It’s ______ outside, I think.




B: No, I can’t hear anything.

5.

A: Wow. The air pollution today in London is really bad.

B: I know. Apparently it’s ______ France.

A: Really? I thought it was just because of all the cars in London.

B: I heard it was because of the weather conditions. The wind has blown

smog from Paris toward London.







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