For forty years Jane Goodall has been outspoken about making the rest of the world understand and respect the life of these animals.1.has been 是is 的现在完成时,那么 be动词时有完成时态的?2.about介词短语充当什么状语呢?
Two men who recently spent five days on a coral island wished they had stayed there longer.请问这个句子中,为什么用完成时态的 had stayed 呢, 这样体现不出"能"的意思吧? "希望能够呆更久",为什么不使用could stayed 呢?
请问一下,China's approach to protecting its environment while feeding its citizens......和Confucius believed knives would remind people of killing and were too violent for use at the table连词前后时态怎么看?
谢谢了!