He had thought for weeks about how he would do it.

I've been thinking about it for weeks, and finally mentioned it to Deck several days ago.

But I've been thinking about it for weeks.

Mr. Clinton was indeed interested, though he said yesterday, "I thought about it for several weeks."

She had been thinking about it for weeks.

You ought to have been thinking about me for weeks.

"I've been thinking about it for several weeks," she said.

I was barely seventeen and I couldn't think of anyone but you for weeks after.

Does it make you notice a chair you haven't thought about for weeks?

Words that I had been thinking for weeks rolled off my tongue now.