great changes _______________in china since 1949have happened since前不是用延续性动词吗?为什么不用 have been happened如果have happened 就不是延续性动词了啊？

great changes Great changes 改同义句：Great changes have taken place in our home town these years.______ ______ ______ great changes in our home town these years. great changes in China GREAT CHANGES HEVETAKENPIACENICHAINITHELASTFEWYEAR翻译 there()great changes in Jiangsu great cutural changes什么意思 一道英语改写句子Great changes have taken place in my hometown in the past few years.(保持原句意思)______ have ______ great changes in my hometown in the past few years. There ______(be) great changes in our country since 1979.用所给词的适当形式填空 过去的数年间,我的家乡变化很大 英语翻译 Great changes _____ ______　＿＿＿　　＿＿＿ 英语翻译在过去的十年里,中国发生了巨大变化.Great changes ______ ______ _______ in China in the past ten years. 英语作文：Great Changes in My Hometown Great changes have taken place since liberation Great changes have taken place there. Great changes in my homtown 英语作文、 英语翻译Great changes —---- ------ young people------ ----- Great changes has been 的同义词 Great changes ______ in Shanghai since the beginning of the reform and openinga、took place b、 has taken place c、 has been taken place d、 have taken place