用现在进行时表示将来意为：“意图“、“打算“、“安排“、常用于人。常用词为 come, go, start, arrive, leave, stay等。I’m leaving tomorrow.Are you staying here ti
现在完成时现在完成时用来表示之前已发生或完成的动作或状态，其结果的确和现在有联系。动作或状态发生在过去 但它的影响现在还存在；也可表
cease doing/to docease to do 长时间，甚至永远停做某事。cease doing 短时停止做某事，以后还会接着做。That department has ceased to exist forever.那个部门已不复
try doing/to dotry to do努力，企图做某事。try doing 试验，试着做某事。You must try to be more careful.你可要多加小心。I tried gardening but didn’t succeed.我试着种
A hurricane is a storm which can cause terrible destruction and death. Hurricanes bring tremendously strong winds, so strong they can knock down buildings. The wind travels as fast as a speeding autom
Meat is kept fresh by storing it in refrigerators. However, there are other ways of keeping meat fresh. For example, it can be rubbed with salt or can be dried or smoked. These ways were popular befor
In the 20th century, machines are run mostly by electricity. Two hundred years ago electricity was not in common use. Machines were often run by water, and therefore many factories grew up by running
Wars kill millions of people. But war is not the only cause of large-scale death. 700 years ago a terrible disease called the Bubonic Plague killed more than 40 million people. In Europe it killed 1 p
Primitive umbrellas have been used for more than 2,000 years. However, the type of umbrella we use today was designed less than 3 hundred years ago. Our present umbrella is made of steel covered with
Many Americans enjoy watching sports. For many years the favorite sport in this country has been football. Football games draw a very large audience. Year after year the most important games have attr