A common mistake we see while\u00a0proofreading\u00a0is incorrect use of prepositions. Although short, these words are vital for creating grammatical sentences. As such, we\u2019re looking at two you may see every day: \u201cfor\u201d and \u201con.\u201d\nWhat Are Prepositions?\nPrepositions\u00a0are words that specify a relationship between a noun and another word in a sentence. For example:\nKate is going\u00a0to\u00a0the class.\nIn this sentence, the preposition \u201cto\u201d tells us where Kate is going by linking the verb \u201cgoing\u201d with the noun \u201cclass.\u201d The trouble is that many prepositions have various uses, which can make picking the right word difficult.\n\nBut if you can remember some of the main uses of \u201cfor\u201d and \u201con,\u201d you\u2019ll find it much easier to express your intentions clearly.\nPreposition #1: For\n\u201cFor\u201d has\u00a0many different uses, including:\n\n \tIndicating who should to have something (e.g., I have good news\u00a0for you!)\n \tA reason or cause (e.g., I couldn\u2019t see the horizon\u00a0for\u00a0the fog.)\n \tIllustrating a span of time or distance (e.g., The road is straight\u00a0for\u00a0miles.)\n \tMeaning \u201cOn the occasion of\u201d (e.g., She got a new car\u00a0for\u00a0her birthday.)\n \tExpressing support or agreement (e.g., I voted\u00a0for\u00a0change!)\n \tComparing something against expectations (e.g., It\u2019s big\u00a0for a sandwich!)\n \tShowing something is done to help someone (e.g., I\u2019ll I carry that\u00a0for you.)\n \tBeing a representative of a group (e.g., She works\u00a0for\u00a0the company.)\n \tExchanges (e.g., I swapped my hat\u00a0for\u00a0a tiara.)\n\nThis isn\u2019t a definitive list! But it does cover some common uses. And if you practice using this term in different contexts, you master it.\nPreposition #2: On\nThe preposition \u201con\u201d has several uses, too. It can mean the following:\n\n \tCovering or being in contact with a surface (e.g., You have ink\u00a0on\u00a0your shirt.)\n \tSomething will occur at a specific time (e.g., The game is on\u00a0Friday.)\n \tBeing positioned above or atop something (e.g., The lizard sat\u00a0on\u00a0the rock.)\n \tUsing something, often a machine (e.g., He\u2019s always\u00a0on\u00a0the phone!)\n \tSomething is dependent on something (e.g., She\u2019s\u00a0on\u00a0life support.)\n \tImmediately after (e.g., On\u00a0realizing their mistake, they took action.)\n \tAbout or concerning (e.g., I wrote my thesis\u00a0on\u00a0lexical ambiguity.)\n \tVia a medium, particularly electronic media (e.g., I saw it\u00a0on\u00a0TV.)\n \tThe state of something (e.g., The roof is\u00a0on\u00a0fire!)\n \tDirection or location (e.g., Stop when you see the fire station\u00a0on\u00a0your left.)\n \tPaid for or supported by (e.g., Students often live\u00a0on\u00a0a limited budget.)\n\nAs above, this list isn\u2019t complete since \u201con\u201d is a very flexible word. That why it\u2019s good to practice using prepositions until you\u2019re familiar with their meanings! Having someone\u00a0check your work\u00a0for misplaced prepositions is a good idea, too, as you can learn from their feedback.