Add - (ed) to given verbs 1 decide 2 agree 3 play 4 watch 5 water 6 study 7 open 8 close 9 wait 10 brush 11 try 12 riss 13 call 14 invite 15 observe

1) decide - decided;

2) agree - agreed;

3) play - played;

4) watch - watched;

5) water - watered;

6) study - studied;

7) open - opened;

8) close - closed;

9) wait - waited;

10) brush - brushed;

11) try - tried;

12) miss - missed;

13) call - called;

14) invite - invited;

15) observe - observed.