past perfect continuous tense
Thepastperfectcontinuoustensereferstoaverbtensethatweusetoexpressthatanactionthatbeganinthepastandcontinueduptoanotherpointin ...,Pastperfectcontinuous:form;+.I,she,he,it,you,we,they.(fullform).had;+·I,she,he,it,you,we,they.(shortform).'d;−.I,she...
Past Perfect Continuous Tense
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2023年5月18日—Theformulaforthepastperfectcontinuoustenseishadbeen+[presentparticiple(rootformofverb+-ing)].Unlike ...
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