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English definition of “long”

long

adverb (IF)    /lɒŋ/ US  /lɑːŋ/
as/so long as B1 used to say that something must happen before something else can happen : I can come as long as I can leave by 4.00. Bring your friends by all means - just so long as I know how many are coming.Connecting words which express a condition Grammar:As long as and so long asAs long as and so long as are conjunctions.Grammar:Should you (Should with inversion)In formal situations, we can use should + subject (s) + verb (v) instead of if:Grammar:Had you (Had with inversion)In formal situations, we can use had + subject + verb instead of if in third conditional sentences:Grammar:+ In formal situations, we can use if + were to when we talk about things that might happen but which we think are unlikely:Grammar:As long as, so long as, providing, etc.Sometimes we need to impose specific conditions or set limits on a situation. In these cases, conditional clauses can begin with phrases such as as long as, so long as, only if, on condition that, providing (that), provided (that).Grammar:Or and otherwiseWe often use or and otherwise with conditional meanings:Grammar:SupposingSupposing may be used with a conditional meaning. It can be used in first, second or third conditional sentences. The speaker invites the listener to imagine a situation:Grammar:Conditionals: other expressions (unless, should, as long as)Grammar:UnlessConditional clauses can begin with unless. Unless means something similar to ‘if … not’ or ‘except if’.Grammar:LongLong is an adjective or an adverb.Grammar:MeasurementsGrammar:Area: length, width, depth and heightWe use the nouns length, width, depth and height and the adjectives long, wide, deep and high to talk about area and size:Grammar:Weight and volumeWe use the verb weigh to measure weight:Grammar:Frequency, speed, timeWe use many different expressions to describe frequency, speed and time. Here are some of them:
(Definition of long adverb (IF) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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