should
c.1200, from Old English sceolde, past tense of sceal (see shall). Preserves the original notion of "obligation" that has all but dropped from shall.
| 词汇 | should | 
| 词根词缀 | Online Etymology Dictionary should c.1200, from Old English sceolde, past tense of sceal (see shall). Preserves the original notion of "obligation" that has all but dropped from shall. | 
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