There is an event or activity and then immediately there is another event or activity.(2)
Two event or activities happen at the same time.(1)
One activity is in progress as another activity happens or is in progress.(3)
There are two events or activities. This word signals the time of the second event or activity.(6)
There is a time limit on this activity.(4)
There are two events or activities. This word signals the time of the first event or activity.(5)