be treated和being treated的区别
The patient strongly objected to _______ like this.
我填be treated
正确是being treated
能讲讲为什么吗,我写的那个不也是表一个时间点和被动吗
在这有什么区别这俩
可这怎么回事
The fifth generation computers,with artificial intelligence,___ and perfected now.
我填的have developed
正确是are being developed
我发现我分不清什么时候用 being 什么时候用have那种形式,请问有规律吗,是说NOW 所以用现在进行吗,可是现在完成也可以用NOW啊,而且后面 perfected我觉得我填的和原句更平衡啊,请您讲下,
还有这个
Most environmental problems exist because adequate measures for preventing them___in the past
我写的haven't taken
正确是were not taken
我写的为什么不成,如何分别适用have形式和be形式,