肯定句:主语+动词过去式+其他
I helped you just now.
I was there yesterday.
否定句:主语+did not+动词原形+宾语+宾语补足语
She did not say that.
或主语+be的过去式+not+其他
It wa...
肯定句:主语+动词过去式+其他
I helped you just now.
I was there yesterday.
否定句:主语+did not+动词原形+宾语+宾语补足语
She did not say that.
或主语+be的过去式+not+其他
It wa...