be treated和being treated的區(qū)別
The patient strongly objected to _______ like this.
我填be treated
正確是being treated
能講講為什么嗎,我寫的那個(gè)不也是表一個(gè)時(shí)間點(diǎn)和被動(dòng)嗎
在這有什么區(qū)別這倆
可這怎么回事
The fifth generation computers,with artificial intelligence,___ and perfected now.
我填的have developed
正確是are being developed
我發(fā)現(xiàn)我分不清什么時(shí)候用 being 什么時(shí)候用have那種形式,請(qǐng)問有規(guī)律嗎,是說NOW 所以用現(xiàn)在進(jìn)行嗎,可是現(xiàn)在完成也可以用NOW啊,而且后面 perfected我覺得我填的和原句更平衡啊,請(qǐng)您講下,
還有這個(gè)
Most environmental problems exist because adequate measures for preventing them___in the past
我寫的haven't taken
正確是were not taken
我寫的為什么不成,如何分別適用have形式和be形式,