Speed的過去式和過去分詞形式相同，均為"sped"。這個詞作為名詞和動詞都有多種含義。作為名詞，它指的是速度、快、速率、進度、加速等。例如："He reduced speed and turned sharp left." 意為"他減慢速度，然后急轉左。" "The car was gathering speed." 意為"汽車正在加速。" "We aim to increase the speed of delivery." 意為"我們力爭提高送貨速度。" "The accident was due to excessive speed." 意為"事故是由于超速造成的。" "He drove off at high speed." 意為"他駕車高速離開。" "In the late 1850s the speed of technological change quickened." 意為"19世紀50年代末，技術變革的速度加快了。" "Speed is the essential ingredient of all athletics." 意為"速度是所有田徑運動項目的關鍵要素。" "I was amazed at his speed of working." 意為"他工作的速度讓我感到驚訝。"作為動詞，speed的意思是加速、快速前行、快速運送、促進。例如："He sped away on his bike." 意為"他騎著自行車飛快地離開了。" "The cab speeded them into the centre of the city." 意為"出租車迅速地將他們送到了市中心。" "The drugs will speed her recovery." 意為"這些藥物將促進她的康復。" "The police caught him speeding." 意為"警察抓住了他超速行駛。" "This man was not qualified to drive and was speeding." 意為"這個人沒有駕駛資格，并且超速行駛。"通過以上內容，我們對Speed的過去式和過去分詞有了更深入的了解，希望這對你有所幫助。