一、倍数增减的表示法

　　1) is 2.5 times greater than Force N2

　　(考点：倍数 + 形容词/副词比较级 + than)

　　2) reacts three times as fast as the other one

　　(考点：倍数 + as + 形容词/副词 + as)

　　3) is 49 times the size of the moon

　　(考点：倍数 + 名词)

　　4) wants to raise the rent by a third

　　(考点：动词 + by + 数词/百分比/倍数)

　　5) plan to double their investment

　　(考点：double + 名词)

　　二、时态

　　1) or the wedding will have finished by the time we get to the church

　　(考点：将来完成时)

　　2) the children had fallen asleep

　　(考点：过去完成时)

　　3) my sister will be taking her vacation at the seaside

　　(考点：将来进行时)

　　4) have been revising my resume all the morning

　　(考点：现在完成进行时)

　　5) No. It has been five years since I went on holiday

　　(考点：It has been … since sb. did sth. 表示某人有多长时间没有做某事了)

　　6) He has been in the army for 5 years

　　(考点：1. 现在完成时;2.要用持续性动词才能接一段时间)