ithas后面加什么词性

it后一般跟谓语，也就是动词；

例句

It has a short stumpy tail covered with bristles.

它有一条又短又粗、长满了刚毛的尾巴。

This technique is useful but it has its limitations.

这种技术实用，但也有局限性。

It has vanished as surely as one\'s belief in Santa Claus or the tooth fairy.

毫无疑问，人们对于圣诞老人或牙仙的信仰已经消失了。

It has a stylus-operated on-screen keyboard that takes great skill to master.

有由触笔操控的银幕键盘，需要很高的技巧去掌握。

It has been suggested that mammals took over from dinosaurs 65 million years ago.

有人提出哺乳动物是在6 500万年前取代恐龙的。