-1
votes
5answers
196 views

“By the time”: what time case to choose?

I have the following sentence that I doubt about what time to choose: By the time they are in their late teens, their ability to learn ____. What should I use? is lessening lessens lessened ...
0
votes
3answers
326 views

Present Perfect or simple past?

A student has written: Still, I have already been aware of most of the information even before watching the video. It doesn't feel right and I would normally use a past simple here. I'm on my ...