Use of English: would, used to and the stative trap
During a PAU-style grammar transformation drill, a candidate has to rewrite six sentences without changing their meaning. Item 4 reads: 'My grandmother had a small house by the river.' The required beginning is 'My grandmother...' and the candidate must use 'would'. The candidate writes: 'My grandmother would have a small house by the river.' Item 5 reads: 'Every summer, she took me to the river before breakfast,' and the candidate writes: 'Every summer, she would take me to the river before breakfast,' which the teacher marks correct. The candidate is confused: 'If item 5 is right, why is item 4 wrong? Both are past habits.' The class has already seen that 'used to' can describe past states and repeated actions, while 'would' is restricted. The teacher wants to turn the pair into a clear decision procedure, not a list to memorise.
1. Explain the grammatical contrast between the two items and correct item 4.
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The correction is 'My grandmother used to have a small house by the river' or simply 'had'. 'Would' in past-habit narratives is limited to repeated dynamic events: 'would take', 'would visit', 'would spend'. It does not describe past states, possessions or permanent situations. 'Have' here means possession, a stative relation, so 'would have' is not a past habit; it would be read as a conditional ('she would have a house if...') or a hypothetical. The decision procedure is: (1) Is the past situation a state, possession or permanent condition? If yes, use 'used to' or the past simple. (2) Is it a repeated action? Then 'would' or 'used to' both work. (3) Does the sentence already have a past time anchor or frequency expression? 'Would' needs that narrative frame.
2. The candidate asks whether 'My grandmother would own a small house by the river' is acceptable. Answer the query and connect it to the same rule.
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No. 'Own' is stative, like 'have' (possession), 'know', 'believe', 'belong' and 'cost'. 'My grandmother would own a small house' is not a natural past-habit sentence. Use 'used to own' or 'owned'. The same test applies: if the verb describes a continuing state rather than a repeatable event, 'would' is excluded. This is why the candidate's item 4 and item 5 are not contradictory: 'take me to the river' is a repeated dynamic event; 'have a house' is a state.
3. Rewrite item 5 with 'used to' and say whether the meaning changes.
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'She used to take me to the river before breakfast' is grammatical. The core meaning is similar, but 'used to' can imply that the habit no longer continues, whereas 'would' is more narrative and nostalgic and does not by itself mark discontinuation. In a transformation item, either may be accepted if the prompt does not require 'would'; if the prompt requires 'would', only the dynamic verb version is valid. The candidate should not treat them as interchangeable in every context.