In the past several weeks,many cities in China have been suffeing from heavy fogs.想问,in the past several weeks 不是一个过去时态的时间状语吗?为什么用现在完成时呢?

in the past years he____(write)several novels The song____(sing) many times by the students in the past several months In the past several years,i had many chances to inspect many places of China 英语翻译she rememberd several occasions in the past when she had experiened a similar feeling. Several times over the past decades In the past several weeks,many cities in China have been suffeing from heavy fogs.想问,in the past several weeks 不是一个过去时态的时间状语吗?为什么用现在完成时呢? Our school has changed greatly in the past several years.There ___ ___greatl changes in the past several years in our school.改同义句.这个非延续动词是怎么变成延续性动词的？ He has broken into (several) computer systems in the past two months.(提问)______ _______computer______ ______ ______ ______ ______in the past two months?怎么没人回答啊 over the past months our products have been exported to several countries in volum.语法有错吗 一道首字母填空题In the past few months ,several fishing boats have s_____ mysteriously around this area. 英语.Our school has changed greatly in the past several year.同义句Our school has changed greatly in the past several year. There （ ）（ ）great changes in the past several year.有人说是 have been .不是there 后面一般不用have in the past造句 Memory in the past in the past two in the past翻译 ：in the past century in the past long in the past few