The basic unit of English grammar is the clause:

[An unlucky student almost lost a 17th century violin worth almost £200,000]

[when he left it in the waiting room of a London station.]

[William Brown inherited the 1698 Stradivarius violin from his mother]

[and had just had it valued by a London dealer at £180,000.]

Clauses are made up of phrases:

[An unlucky student] + [almost lost] + [a 17th century violin worth almost £200,000]

[when] + [he] + [left] + [it] + [in the waiting room of a London station.]

[William Brown] + [inherited] + [the 1698 Stradivarius violin] + [from his mother]

[and] [had just had it valued] + [by a London dealer] + [at £180,000.]

We can join two or more clauses together to make sentences.

An unlucky student almost lost a 17th century violin worth almost £200,000 when he left it in the waiting room of a London station.

William Brown inherited the 1698 Stradivarius violin from his mother and had just had it valued by a London dealer at £180,000.


 

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Comments

And I wonder if we can write like this?
while making presentations,reading a book or doing my homework.

Hello Aram1999,

There is no problem with any of those. Of course, they are not complete sentences and whether or not they are appropriate will depend upon the context in which they are used, but they are not grammatically incorrect in any way.

 

Best wishes,

Peter

The LearnEnglish Team

Excuse me,Sir.Can we use when and while together in these sentence below?
For instance,when I listen to classical music,while reading a book,making presentations or doing my homework,I understand the information better.

Hello Aram1999,

Yes, that is perfectly correct. Good work!

All the best,
Kirk
The LearnEnglish Team

Thank you very much,sir

Hello.Please, check this question.
For instance,when I listen to classical music while reading a book,doing my homework or making presentations,I understand the information better and easier.
Thank you

Hello Aram1999,

That looks fine to me. In the future, please let us know which specific part of a sentence you have a question about. It will help us help you better.

All the best,
Kirk
The LearnEnglish Team

Firstly,Sir,I would like to know if we can use when with while in this sentence

Hello,

''When I stole his wallet, he started not trusting me anymore, so since then he has not liked me''

''When I stole his wallet, he started not trusting me anymore, so since then he doesn't me''

Which tense is proper (present simple or perfect)?

Thank you.

Hello JakiGeh,

The first one (present perfect) is the correct one in English because the past action began in the past and is still true in the present. The second one is not correct in any situation in English. This is a difference between English and Spanish.

All the best,
Kirk
The LearnEnglish Team

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