I fished writing a letter .(改为一般疑问句和否定句)

I fished writing a letter .(改为一般疑问句和否定句) I'm writing a letter There I met a friend,___.A.fished B.fishing C.was fish D.to fish 选哪个 what are you going to do?i'mgoing to【 】 a fishes b fishing c fish d fished I am writing a letter是什么意思 I‘m writing a letter.改成问句 I am not writing a letter.改错、 I am writing a letter.提问： I not writing a letter.改错 L am writing a letter对am writing a letter提问 I see some children playing football.对画线部分提问 _______________________ l'm writing a postcardI see some children playing football.对画线部分提问_______________________l'm writing a postcard.对画线部分提问_____________We writ I decided to go ti the library as soon as I fished what I was doing.请问这句话要怎么理解呢?我知道 A 过去时 as soon as B 过去时,所以句中是 decided 与 fished,但后面出现的what I was doing.我就不理解了,为什么要 I am writing a letter.这里的writing是及物动词还是动名词啊? I'm writing a letter 改为特殊疑问句 i have some writing paper an a envelope 怎么改错 Am I writing a letter?的反义疑问句是什么? 现在完成进行时态与现在进行时态的区别是什么?例如i have been writing a letter和i am writing a letter例如i have been writing a letter和i am writing a letter有什么区别 a,letter,was,just,i,now,writing怎么写