from then on 从那时起 既可以跟一般现在式,也可跟过去式,但不跟完成时态 From then on, he never spoke to me.从那时起,他就不跟我说话了 ever since 自从,从……起,从那时到现在 一般都跟完成时态 He has never spoken to me ever since.从那时起他就已经不跟我说话了.
One such American expression is “Where's the beef?” and it is used when something is not as good as it is said to be. 当事物比介绍差时,这句话被使用。也就是说名不符实。 第二句,似乎在那时所有人都用这句话。 using表示一种状态