来自冯婧的问题
havebeendone和havebeendoing和havingbeendone和havingdone的区别.请举例,
havebeendone和havebeendoing和havingbeendone和havingdone的区别.请举例,
1.havebeendone曾经被e.g.TaiwanhasbeentakenchargeofbytheJapanese.
2.havebeendoing曾经干过一段时间...e.g.Ihavebeenwalkingalongthelake.
3.4.是现在分词形式,一般用作状语,如Havingbeenbittenbyadog,nowIamnotadogfan.
Havingwrittenthesamecompositionbefore,Ipassedtheexamwithease.
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