admin百科知識 2022-02-12 17:41:49 5.They ___ (help)us since five this morning until now.應該填什麽,怎麽分析的?5.They ___ (help)us since five this morning until now.應該填什麽,怎麽分析的?網友廻答：匿名網友have been helping是現在完成進行時的用法.表示從過去開始一直進行著直至現在. db標簽 生活常識_百科知識_各類知識大全»5.They ___ (help)us since five this morning until now.應該填什麽,怎麽分析的?
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