1.命令:删除,改变,重复,剪切,复制
d:delete
x:dl
c:change
r:replace
R:replace mode
.:redo
v:visual
V:visual line
<C-V>:visual block
y:yank(copy)
p:put(paste)
aw/as:a word/a sentence
iw/is:inner word/inner sentence
2.目前的四种模式
(1) Normal Mode
(2) Insert Mode
(3) Visual Mode
(4) Replace Mode
3.三种small change基本模式
(1) operator-motion
(2) visual-operator-motion
(3) operator-text object