问题描述：
关于英语 there be 句型的一些问题
eg:There existed roaches in ancient times.(古代有蟑螂)这句话是there be 是的话be哪去了?
there be 句型中be可以变为was were 也可以变为be going to和have been 如果是的话,为我分析下下面两句话
eg:There is going to be a meeting tonight.（这里面感觉是现在进行时插入在there be中间而非be变为be going to .）
eg:There have been a big tree on the top of the hill.(这里面又觉得be直接变成了has been而非插入)
eg:There existed roaches in ancient times.(古代有蟑螂)这句话是there be 是的话be哪去了?
there be 句型中be可以变为was were 也可以变为be going to和have been 如果是的话,为我分析下下面两句话
eg:There is going to be a meeting tonight.（这里面感觉是现在进行时插入在there be中间而非be变为be going to .）
eg:There have been a big tree on the top of the hill.(这里面又觉得be直接变成了has been而非插入)
问题解答：
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