1. This summer I have put on three pounds. I'll need to exercise to lose weight.2. She has put on some weight when she's back from her vacation in Taiwan.
put on (weight)我變胖三公斤 = I have put on three kilograms美國的重量是以 pound 做單位，也就是磅，一公斤等於 2.20462262 磅
Here's your next assignment. This time please put effot into it.