Page 277 - Practical English Usage 3ed - Michael Swan, Oxford

2 arrive etc
We use in (or at), not to, after arrive and land.
We arrive in Bangkok on Tuesday morning. (NOT Vie arrilJe UJ Bangkok . ..) What time do we land at Barcelona? (NOT ••• laM t6 Bareeltma?)
271 in case and if 1 precautions
In case is mostly used to talk about precautions - things which we do in order to be ready for possible future situations.
I always take an umbrella in case it rains. (= ••• because it might rain.) To talk about the future, we use a present tense after in case (see 580).
I've bought a chicken in case your mother stays to lunch. (NOT ••• in t:ttSe )l6ftr m6ther wiU stay ...)
2 incase...should
We often use should + infinitive (with a similar meaning to might) after in case. This adds the meaning 'by chance'.
I've bought a chicken in case your mother should stay to lunch.
This structure is especially common in sentences about the past.
I wrote down her address in case I should forget it.
The meaning 'by chance' can also be expressed by (should) happen to.
We took our swimming things in case we happened to find a pooL (OR • . • in case we should happen to find a pooL)
3 in case and if
In case and ifare normally used in quite different ways.
'Do A in case B happens' means 'Do A (first) because B might happen later'. 'Do A ifB happens' means 'Do A if B has already happened'. Compare:
- Let's buy a bottle ofwine in case Roger comes.
(= Let's buy some wine now because Roger might come later.)
Let's buy a bottle ofwine ifRoger comes. (= We'll wait and see. IfRoger
comes, then we'll buy the wine. If he doesn't we won't.)
- I'm taking an umbrella in case it rains.
I'll open the umbrella ifit rains. (NOT {'U6fJt!ft the umbrella in t:ttSe it rains.)
- People insure their houses in case they catch fire. (NOT ••• ifthey eatchfire.) People telephone the fire brigade i f their houses catch fire. (NOT • • • teleph6fte
... in t:ttSe their h6ttSeS catch fire.) 4 incaseof
The prepositional phrase in case ofhas a wider meaning than the conjunction in case, and can be used in similar situations to if.
In case a/fire. break glass. (= If there is a fire ...)
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