在Lesson 35,Unit 9,Senior Book Three中，有这样一个句子：The first thing she did was go up to her trainer and thand her for all her help during her training.在这一句话里，动词不定式go up to her trainer and thank her for all her help during her training前没有符号“to”。这是因为主句的主语有定语从句she did来修饰的缘故。
Water has been one of Hong Kong‘s biggest problems. Sometimes they have too much rain and this causes a great deal of damage. At other time they have not enough. Once water taps could be used for only four hours every fourth day. For the rest of the time, there was no water. Some of the water they use comes from China but it is not enough. They have an average(平均的) rainfall of about 216cm and it is very important to use all of it. Unfortunately,
Rogger Crawford had everything he needed to play tennis--except two hands and a leg. He had no palms (手掌). The baby‘ s arms and legs were shortened, and he had only three toes on his right foot and his left leg was cut off.