同义句she swam in the river very fast

同义句she swam in the river very fast we swam in the river.we were young at that time同义句 为什么过去式不要加be动词?比如She swam in the sea.而不是 She was swam in the sea? John often swam in the river when he was a child.(同义句）John ( )( )swim in the river when he was a child. Then she swam to the shore after spending the whole night in the water.不太明白句中after的用法和意思 swam in the sea意思 She looks beautiful in the red dress.的同义句 she is in the Reading Club 的同义句 She used to work in the factory改为同义句,````` She buys some food in the mall 的同义句 She usually enjoys herself in the park.改同义句 She isn't in the house.的同义句 She likes reading in the park 改同义句 She likes reading in the park 的同义句 She does her homework in the afternoon.同义句 How does she like the weather in Shanghai?同义句 --- --- she ---- ---- the weather in Shanghai? Tom swam in the river yesterday.swam提问 She always erercise in the morning.改为同义句.She always___ ___in the morning.