Page 529 - Practical English Usage 3ed - Michael Swan, Oxford

sentence structure (2): conjunctions 510
8 subordinateclauses(after...,if...,because..•,etc)
Adverbial subordinate clauses (beginning for example. after. before. when. while. if, because) can usually come either before or after the rest of the sentence (see 510.3).
After I left school I spent a year in China. (OR I spent a year in China after I left schooL)
9 prepositions: in what .. . I what ... in
In an informal style. a preposition can be separated from its object in certain structures. For details. see 452. Compare:
In what hotel did the President stay? (formal) What hotel did the President stay in? (informal)
For ways of arranging the information in a sentence. see 512.
For special structures in spoken English. see 514.
For word order in exclamations (e.g. How killd YOIl are! I. see 195.
For word order with phrasal verbs (e.g. SlIe pllt Ollt the cat I She pm the cat olll), see 599.4. For structures like The older I get . .. , see 139.5.
For structures like cold aslthollgh size was, see 71.
For structures like solhow strallse all experiellce. see 14.
For qllite a ... and rather a ...• see 489, 490.
For word order with ellollgil. see 187.
510 sentence structure (2): conjunctions 1 What are conjunctions?
Conjunctions are words that join clauses into sentences. ClAUSE CONI UNCflON ClAUSE
IIII
I went to bed early because I was extremely tired.
I
SENTENCE
I
Conjunctions not only join clauses together; they also show how the meanings of the two clauses are related.
We brought the food and they supplied the drink. (addition) She was poor but she was honest. (contrast)
We can go swimming. or we could stay here. (alternative) People disliked her because she was so rude. (cause)
I'll phone you when I arrive. (time)
2 two kinds
And, but and or are often called 'co-ordinating conjunctions'. They join pairs
of clauses that are grammatically independent of each other.
..
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