Do you know when to use the prepositions at, on, in, since, for, during, and while? Take this grammar challenge and find out! We’ll review how to use these common prepositions in today’s class. I’ll also refer you to my complete lessons on each of these preposition groups, so you can learn and master them fully. Next, for a complete program to upgrade your English, take my online course: https://www.engvid.com/to/rebecca10mi...

Watch the full lessons on each topic:
AT, ON, IN    • Master AT, ON, IN with the TRIANGLE m...  
SINCE, FOR    • English Grammar - SINCE & FOR  
DURING, WHILE    • DURING or WHILE?  

In this video:
00:00 Grammar Challenge: Prepositions!
04:04 "since" or "for"?
05:30 "during" or "while"?
06:52 "at", "on", or "in"?