please write the words your pen

with
write in pen 用钢笔(指材料不用冠词)
write with a pen 用钢笔写(指文具)
* in "用",后常接语言,材料,方式等.例:
(1)Can you sing in English?
(2)He likes wirting in ink/pencil.
(3)You should do it(in) this way.
* with 常用来表示"用.工具.例:
write with a pen 用钢笔写
cut...with a knife 用刀子切