having spent some time in the city ,he had no trouble finding the way to the history museum.还有一题翻译the professor required that we hand in our research reports.

having spent/have spent 的区别 having spent some time in the city...求高手解释这是什么时态吖?have用现在分词,spent是过去分词. spent some time in sth I spent hours _____(do) some reading. some are without having breakfast most people prefer having spent money to having earned it为什么用 having spent和 having earned 而不用 spending和earning After having spent whole mornings on the river,这句话spent后可不可以加the After having spent whole mornings on the river,这句话spent后可不可以加the TI ti ti having spent some time in the city ,he had no trouble finding the way to the history museum.还有一题翻译the professor required that we hand in our research reports. she swam to the shore having spent the night in the water.这里为什么用having spentA.having spent B.having spenting C.when spending D.had spent 来自新概念英语157页 spent. 音标/ti:/ Would.you.like.some.根据音音标/ti:/ Would.you.like.some.根据音标写单词 I feel like having some ice-cream. what about having some cakes?什么意思？ what about having some water?怎么回答