They were young,tall,big,old,short,small,young,thin,连一连,现在“是” am is are,过去“是” was were,isnt = is not arent= are not 那么， wasnt= _ werent = _,否定式,was not,were not,It wasnt beautiful then,was not,now,then,were not,They werent beautiful then,They werent old then. They were young,They are old now,Now she is tall,It is clean now,It wasnt clean then. It was dirty,clean,dirty,clean,dirty,dirty,clean,2,She is tall. She wasnt tall then. She was short,Fill in the blank,They _ old then. T
