Ejercicios de transformación gramatical con respuestas comentadas (nivel intermedio)

Intermediate level

1.- Are these books yours?
(own)
1.- ...................these books?

2.- My boss tries really hard to help me
(effort)
2.- My boss really ...................to help me

3.- That actress is only 22. I thought she was older
(as)
3.- That actress isn't..........I thought

4.- Olivia wasn't allowed to go camping with her boyfriend
(let)
4.- Olivia's parents...............go camping with her boyfriend

5.- Dick is in prison because a detective recognized him
(hadn't)
5.- If a detective ................, Dick wouldn't be in prison

6.- "Have you been on holiday recently, Ann?", Tony asked
(been)
6.- Tony asked Ann .........................on holiday recently

7.- The meal we had yesterday in that restaurant was so good!
(such)
7.- We had................yesterday in that restaurant!

8.- There's no point asking Jessica to help as she's really busy
(waste)
8.- It's .....................asking Jessica to help as she's really busy

9.- Does your sister resemble you?
(look)
9.- Does your sister .................you?

10.- The police are interrogating the suspects
(interrogated)
10.- The suspects ...................by the police

KEY

1.- Do you own 
Commentary: if sth is yours, you own it.

2.- makes an effort
Commentary: to try hard to do sth and to make an effort to do sth are synonymous.

3.- as old as
Commentary: For comparatives of equality, we use as....as in affirmative sentences,, and not as....as or no so.....as in negative sentences.

4.- didn't let her
Commentary: if sb is not allowed to do sth, they don't let him/her do sth. Make sure you use an infinitive without to after let.

5.- hadn't recognized him
Commentary: In third conditionals, you use a past perfect in the if-clause and would have + past participle in the main clause, but in this example, we have a mixed conditional, so would be has been used in the main clause instead of would have been, as Dick being in prison is a fact and not a possibility.

6.-  if/whether she had been
Commentary: The present perfect in direct speech becomes a past perfect in indirect/reported speech.

7.- such a good meal
Commentary: In exclamative sentences, you use so + adjective or such + a/an+ adjective + noun.

8.- a waste of time
Commentary: When there's no point doing sth, it's a waste of time doing it.

9.- look like
Commentary: to resemble and to look like are synonymous.

10.- are being interrogated
Commentary: to interrogate in the active becomes to be interrogated in the passive.