求高手解答现在完成时练习2.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 10

求高手解答现在完成时练习2.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 10 求高手解答现在完成时练习22.用since和for填空1) ______ two years 2) _______ two years ago 3) _______ last month4) ______ 1999 5) _______ yesterday 6) _______ 4 o’clock7) ______ 4 hours 8) _______ an hour ago 9)______we were children 1 since 后面用现在完成时? since 从句后面用现在完成时? 英语现在完成时问题I have gone at this school since 2012.这句话为什么用at?词组不是应该是have gone 请问区别,求用例句解答. 是不是看见since就要用现在完成时? .since yesterday前面用现在完成时,还是过去完成时? 现在完成时练习! 现在完成时+since+具体时间造句用“现在完成时+since+具体时间/一般过去式”和“现在完成时+for+一段时间”分别造句 地理练习.求高手 英语练习求解答 现在完成时+since+句子 现在完成时 since造句 因式分解,求高手解答! 小学语文求高手解答 英语求高手解答 小学英语,求高手解答 求高手解答