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【正文】 — could will — would shall — should may — might must — must 。 相似歸納 tell — told — told sell — sold — sold say — said — said pay — paid — paid lay — laid — laid keep — kept — kept sleep — slept — slept sweep — swept — swept stand — stood — stood understand — understood — understood catch — caught — caught teach — taught — taught buy — bought — bought bring — brought — brought fight — fought — fought think — thought — thought 改變其中一個(gè)字母 build — built — built lend — lent — lent send
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