Why do we learn English? Because many people use English in many countries. It will be easy to understand them if （如果） we can use English too. But it is not easy to learn English well. There are so many words. It is easy to make mistakes with them. One day, Amy asked Lingling to bring some caps, but Lingling brought some cups. Everyone laughed when they put on the cups because they had to （不得不） play baseball with small cups on their heads.
