is,a,this,pen,red,连词成句

This is a red pen
意思是这是一支红色的笔

this is a red pen

this is a red pen
this 这
is 是
a 一个
red 红色的
pen 钢笔

this is a red pen
或是问句
is this a red pen？

应该只有两个了·

This a pen is red

This is a red pen(这是一支红色的笔)