Choosing Between 'afford' and 'pay' in a School Announcement
You are reviewing a vocabulary and grammar item with a student. The item is a single sentence with a blank: 'Because the trip costs 12,000 yen and the deadline is Friday, students who cannot ______ the full amount should speak to Mr. Sato in the office.' The four choices are afford, spare, pay, and spend. The student chooses 'spare' because she has seen 'spare money' in a textbook. You know the answer key says 'afford,' but the student argues that 'cannot pay' also sounds correct. The sentence is from a section testing verb choice in a school announcement, and the instructions say 'Choose the most appropriate word.' The student also notes that 'spare' means 'to give extra,' which does not fit because the students are not giving money to the office. She wants a rule she can apply next time, not just the answer.
1. Explain why 'afford' is the best choice rather than 'pay' or 'spare.'
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Start with the meaning the sentence needs: a student does not have enough money before a deadline. Afford means 'to have enough money for something,' so 'cannot afford the full amount' expresses a lack of financial ability. It fits the cause-and-effect structure: because the trip costs 12,000 yen and the deadline is Friday, students who lack the money should ask Mr. Sato. Pay is grammatical, but 'cannot pay the full amount' focuses on the act of paying and can suggest refusal or a failed transaction. The announcement is not accusing students of refusing; it is offering help to students who lack funds. Spare does not fit the pattern 'spare the full amount' in this context. 'Spare money' means extra money, and 'spare someone' means not harm them; neither meaning matches 'cannot ______ the full amount.' The student's own observation is correct: spare implies giving extra, not needing help to meet a cost. The rule is to match the verb to the situation, not just to a familiar phrase.
2. The student asks, 'If "pay" is grammatical, why is it not the answer?' Write a short explanation of how examiners use 'most appropriate' to test collocation and context.
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'Most appropriate' means the word must fit both grammar and situation. Grammar only tells us that a verb can go in the blank; context tells us which verb makes the announcement logical. The situation is a cost, a deadline, and an offer of help. 'Afford' names the ability to meet the cost, which is exactly the problem the office is prepared to solve. 'Pay' names the action, not the ability, and it does not explain why the student should speak to Mr. Sato before Friday. Collocation also matters: 'afford the full amount' is a common pairing in warnings about money, while 'pay the full amount' is common in instructions about completing a payment. The test is not asking whether 'pay' is English; it is asking which word best completes the office's meaning. Teach the student to paraphrase the sentence first: 'Students who do not have enough money should get help.' That paraphrase points directly to 'afford.'