they began to clumb the mountian after they had bought all the food and drinks改为否定句

they began to clumb the mountian after they had bought all the food and drinks改为否定句 After ＿(test) the machine,they began to work. They stopped_____(play)football because it began to rain It began to rain.They stopped ___(go)home they wre on ____ way to school when it began to rain.( they )应是they were on ____ way to school when it began to rain (they) they (know)each other since they (begin) to work in that factry.请问正确时态是什么呢?1.knew.began.2.have known.began.3.had konwn.began. it began to rain,句中it如何理解?麻烦好心人回答.while they are talking it began to rain. They had a short meeting and began to ( )it when they climbed up the mountains. they began to climb the mountain after they had bought all the food and drin just as they began to eat,they heard a great noise的意思要准确 while they were talking it began to rain and Dimitri stayed in Aleko's house until the rain这句话中while they were talking it began to they began to work instead to make life better 怎么翻译? 单句改错：DO you know when they began to fall in love to each other? They had hardly arrived when it began to snow.和They were about to leave when it began to snow.这两They had hardly arrived when it began to snow.和They were about to arrive when it began to snow.这两个句子意思好像是一样的吧,一个 Many children began to play chess when they were very young 英语翻译：I left meeting when they began to talk about politics and headed for the exit. They began to play in the park three hours ago.(改为同义句) They began to konw each other three months ago.的同义句是什么,