could

aux.v.can的过去式；可能；用来表示请求

cottage cheese, cottage hospital, cottage industry, cottage loaf, cottage pie, cottager, cotter-pin, cotton, cotton candy, cotton seed oil, cotton wool, cotton-wool, cottontail, cotyledon, couch, couch-grass, couchant, couchette, cougar, cough, coulter (US colter), council, council estate, council flat, council house, council house, council-chamber, councillor, councillor (US also councilor), councilor, counsel, counselling, counsellor, counsellor (US also counselor), counselor, count, count for, count in, count noun (also `countable noun), count on, count out,