1.一般在动词词尾加ing.read-reading
2.以不发音e结尾的动词,去掉e,再加ing.Write-writing
3.以重读闭音节结尾的动词,末尾只有一个辅音字母,应先双写这一字母,再加ing。swim-swimming
例如:
shining
eating
falling
singing
having
raining
making
buying
sitting
writing
walking
standing
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