英语词汇in case and if的意思、翻译、用法及例句-英语用法大全

Contents overview

in case and if248 in case and if1precautionsIn British English, 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 (231).I've bought a chicken in case your mother stays to lunch. (not … in case your mother will stay …)2in case … happen toWe can use the expression happen to after in case to emphasise the meaning of 'by chance'.I've bought a chicken in case your mother happens to stay to lunch.We took our swimming things in case we happened to find a pool.Should can be used in the same way in British English, but this is no longer very common. … in case your mother should stay to lunch.3in case and ifIn British English, in case and if are normally used in quite different ways.'Do A in case B happens' means 'Do A (first) because B might happen later'.'Do A if B happens' means 'Do A if B has already happened'. Compare:–Let's buy a bottle of wine in case George comes. (= Let's buy some wine now because George might come later.)Let's buy a bottle of wine if George comes. (= We'll wait and see. If George 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 if it rains. (not I'll open the umbrella in case it rains.)–People insure their houses in case they catch fire. (not … if they catch fire.)People telephone the fire brigade if their houses catch fire. (not … telephone … in case their houses catch fire.)In American English, in case is often used in a similar way to if.In case you're free this evening, give me a call. (less typical of British English)4in case ofThe prepositional phrase in case of has a wider meaning than the conjunction in case, and can be used in similar situations to if in both American English and British English.In case of fire, break glass. (= If there is a fire …)Previous Next

词组	in case and if
释义	Contents overview in case and ifIf248 in case and if1precautionsIn British English, 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 (231).I've bought a chicken in case your mother stays to lunch. (not … in case your mother will stay …)2in case … happen toWe can use the expression happen to after in case to emphasise the meaning of 'by chance'.I've bought a chicken in case your mother happens to stay to lunch.We took our swimming things in case we happened to find a pool.Should can be used in the same way in British English, but this is no longer very common. … in case your mother should stay to lunch.3in case and ifIn British English, in case and if are normally used in quite different ways.'Do A in case B happens' means 'Do A (first) because B might happen later'.'Do A if B happens' means 'Do A if B has already happened'. Compare:–Let's buy a bottle of wine in case George comes. (= Let's buy some wine now because George might come later.)Let's buy a bottle of wine if George comes. (= We'll wait and see. If George 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 if it rains. (not I'll open the umbrella in case it rains.)–People insure their houses in case they catch fire. (not … if they catch fire.)People telephone the fire brigade if their houses catch fire. (not … telephone … in case their houses catch fire.)In American English, in case is often used in a similar way to if.In case you're free this evening, give me a call. (less typical of British English)4in case ofThe prepositional phrase in case of has a wider meaning than the conjunction in case, and can be used in similar situations to if in both American English and British English.In case of fire, break glass. (= If there is a fire …)Previous Next
随便看	indeed indefinite frequency certainty indefinite frequency certainty and completeness indifferent indirect speech advanced points indirect speech infinitives indirect speech introduction indirect speech introduction indirect speech questions indirect speech questions and answers indirect speech tenses infinitive as subject or complement infinitive of purpose i sat down to rest infinitive or ing form infinitives infinitives after adjectives pleased to see you infinitives after nouns infinitives after nouns and pronouns my decision to leave infinitives after question words who to etc infinitives after verbs it s beginning to rain infinitives forms infinitives ing forms infinitives ing forms and past participles after nouns verbs etc introduction infinitives ing forms and past participles introduction infinitives ing forms and past participles other uses introduction