"The People's Republic of China was founded in 1949."这句话是什么时态?为什么要加was,was又是在什么情况下要加?

英语直接引语变间接引语1、He said,I don't like this book. 2、She asked,Do you know the teacher's name? 3、“Don't play football in this room.the teacher said.4、“Lock the door when you leave.Mary said.5、“The people's republ 英语翻译My name is XXX,i dream to be a scientist,a scientist like Tsien Hsue-shen,who was a world-famous scientist who made a great contribution to missile and space program development in both the United States of America and the People's Republ the people's choice the People’s Republic of the People's Liberation Army. the location of the people's square Children go to people's houses and scare the people. the people's republic of china缩写 the people’s republic of china中文翻译 The people 's republic of china the people’s Republic of china The panda are people's friends是什么意思 The world's people are hypocritical.. 人民公园前加the peoples park People's Government前面加不加The ? Doctr can s（ ） the ill people. Act of the People’s Republic of the people 's life of beijing 还是the people of beijing 's life