i got some problems in differentiating those pair of words: 1. skilled- skillful 2. continual- continuous 3. consecutive- successive 4. topic- subject 5. aim- goal- objective 6. watch- look- view- see- observe 7. limit- limitation 8. to learn study 9. search- find- seek- look for 10. change- exchange 11. border- boundary 12. other, the other, another . i got some problems in differentiating those pair of words: 1. skilled- skillful 2. continual- continuous 3. consecutive- successive 4. topic- subject 5. aim- goal- objective 6. watch-. successive 4. topic- subject 5. aim- goal- objective 6. watch- look- view- see- observe 7. limit- limitation 8. to learn study 9. search- find- seek- look for 10. change- exchange 11. border- boundary 12.