It's is an adjective phrase as an adjective describes a noun and the noun is a sweater
Answer:
I have yet to go to the gym since May
I haven't gone to the workout center since May
The first-aider will be ready with a first aid kit and will be on guard in case of accidents or injuries. First aid means, the first action done on someone who is injured or not feeling well within the designated place. He/she must know some first aid treatments or methods, such as treating a cut or bruise, giving artificial ventilation and CPR, etc.
3.The police officer rounded the corner and pumps his arms harder.