Over all, Americans have been drinking less alcohol since the early 1970's.

Well, they had been drinking since 5 in the afternoon.

She'd been drinking a lot of pink since the car wreck.

Not drinking anything since they were all able to go without water until dark.

He had been drinking since early morning and was very much the worse for wear.

She hadn't been able to drink coffee since the bomb.

For all I knew, he had come straight from some party where he'd been drinking steadily since early afternoon.

How the devil can a man think of love who hasn't had a drop to drink since dinner?

Here, according to local legend, university students from Tubingen have been drinking since the 1400's.

He had been drinking steadily since the early morning.