she write a letter跟she writing a lettershe is writing a lettershe was a alettershe wrote a letter区别是区别

二楼正解

she writing a letter这句有语法错误，正确应该是she is writing a letter.
she was a letter这句话本身也有错误
she is writing a letter 跟she wrote a letter的区别在于时态不同，前者是现在时，意思是正在写信，后者是过去式，意思是他写了一封信

我hi上教你

she write a letter为病句，应该是she writes a letter 是一般现在时态 指一般的情况 可用于句子she often writes a letter on Sunday.(她经常在星期日写信） she is writing a letter（她现在正在写信）则为现在进行时态，指现在正在做的事 she was a a letter（她是一封信？？） 除非拿儿打趣 不然没这种说法 she wrote a letter（她写了一封信）则为过去式 说明该动作在过去已经发生