There have been four sets of invaders of England是什么意思

There have been four sets of invaders of England是什么意思 have you ever been to Shenzhen?--yes,I there four months ago THERE HAVE BEEN AT LEAST FOUR SUCH PIGEON PICK-UPS IN CHANGWA的意思 there _____ (be) four buildings built already in our school.是填have been 还是has been have you ever been to guilin? yes ,I 什么 there four months ago.是用have been to 还是 had been to have been there 中文翻译 have been there i have been there （for） four times.这句话中括号里的for要加吗?可不可以不加? 请问这里应该填什么?there ＿＿(be) four buildings built already in our school应该填have been还是has been? 这里应该填什么?there ＿＿ (be) four buildings built already in our school应该是have been还是has been? have been there 还是 have been to there Have you been in there?写成Have you been there? i have always been there i have never been there They have a____ been there There have been 一般疑问句 have you brother been there? I have been there,have been 是have been in还是have been to的缩写? How many countries have you been to____ _____? About four