如：I have had this camera for five years. (状态动词)
I have taken photos of UFO with this camera. （动作动词）
I have been taking photos of UFO with this camera. （动作动词）
注：动作动词表示发生或变化的动作，如go，play。状态动词表示保持不变的动作，如like， know，exist
4．当 never，yet，already，ever出现在句子中时，只用现在完成时态，而不用现在完成进行时态。
如：I’ve never visited Paris.
I’ve already been to Paris.
第二单元
一 将来进行时态
1．我们用将来进行时态来：
1）谈论将来一段时间正在进行的事情。
如：Toby will be climbing in the Himalayas all next week
2）谈论从将来的某一点开始并且有可能要持续一段时间的事情。
如：Toby will not be in London next Tuesday. He will be climbing in the Himalayas.
3）没有任何意图的表达将来的事情。
如：The weather report says that it will be raining when we arrive in London.
在这种情况下表示事情是很自然的发生的，没有人为的安排。
4）礼貌地询问有关其他人将来的计划。
如：Will you be visiting your uncle in Tanzania?
2．将来进行时态的构成：
1）陈述句：will(not)+v-ing
如：Toby and his brother, Colin, will (not) be flying to Morocco.
2）疑问句：will 提到主语的前面
如：Will they be flying to Morocco on 15th July?
3）回答：will（not）
如：Yes, they will. /No, they will not(won’t)
二 过去将来时态
1．我们用过去将来时态和过去进行时态来：
1）表示过去的将来某一时间要发生的动作。
如：They set off at 9 a.m. and would reach the airport an hour later.
2) 暗指一个过去的目的。
如：I was going to leave, but then it rained.
3) 暗指一个过去的安排。
如：Colin called Jennifer to say that he was seeing her later that afternoon.
4) 指代实际已经发生过的将来的动作。
如：The journey that was to change Toby’s life started in July that year.
2．陈述句中过去将来时态的构成：
1）would +动词原形
如：I told you Colin and I would spend a few weeks traveling.
