be动词原形变过去式以及否定缩写,助动词do、does原形变过去式以及否定缩写形?

是什么意思?
2025-03-23 23:52:43
推荐回答(1个)
回答1:

Be:am is / was are / were
do-did didn't doesn't
does是do的第三人称单数