1.   A week does not go by without representatives from around the world arriving to view the Tucson cluster model.

2.   As the weeks went by, I became more and more worried.

3.   Hardly a week goes by without some food scare being reported in the media.

4.   It seems hardly a week goes by anymore without yet another report of zany results of affirmative action in action.

5.   The negotiations became increasingly tense as the weeks went by.

6.   Weeks went past without any news.

7.   The weeks go so quickly!

8.   Several weeks went past before we heard from her.

9.   As the weeks went by, I naturally began to enjoy this new-found notoriety.

10.   As the weeks had gone by the other girl had dropped more and more blatant hints about the fact that she was having an affair with her employer.