规则四、非谓语动词作定语时，表示将来用-to do，表正在进行用-ing，表示已经完成用-ed

例7. The play_____ next month aims mainly to reflect the local culture.

A.produced B.being produced

C.to be produced D.having been produced

解析：根据本题中的时间状语next month，可知the play将要于下月被创作出来，表将来应该用to do，所以答案为C。

例8.The trees _____ in the storm have been moved off the road.

A. being blown down B. blown down C. blowing down D. to blow down

解析：根据句意“被暴风雨刮倒的树已经从路上移走了”，树被刮倒是过去已经完成的动作，表已经完成用-ed形式，所以答案为B。

规则五、介词后跟-ing形式，可以在-ing前加逻辑主语

例9. The discovery of new evidence led to ______________.

A. the thief having been caught B. the thief to be caught

C. catch the thief D. the thief being caught

解析：本题led to中的to是介词，后面应该用-ing形式，the thief作-ing的逻辑主语，所以答案为D。

例10. At the beginning of class, the noise of desks ____ could be heard outside the classroom.

A. opened and closed B. to be opened and closed

C. being opened and closed D. to open and close

解析：本题the noise of中的of是介词，后面应该用-ing形式，desks作-ing的逻辑主语，所以答案为C。

规则六、-ing形式或to do可作主语或宾语，-ed形式则不可以

例11. ___________ in a heavy traffic jam is quite an unpleasant experience.

A. Caught B. Having caught C. Being caught D. To catch

解析：本题中is为系动词，前面应该作主语，用-ing形式，所以答案为C。

例12 ___twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A. Examining B. Examined C. Being examined D. Having been examined

解析：本题中is为系动词，前面应该作主语，用-ing形式，所以答案为C。