Have you known Dr jackson for a long time?—Yes,since she()the chinese societyA has joined B joins C had joined D joined 要解析
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![Have you known Dr jackson for a long time?—Yes,since she()the chinese societyA has joined B joins C had joined D joined 要解析](/uploads/image/z/5694730-34-0.jpg?t=Have+you+known+Dr+jackson+for+a+long+time%3F%E2%80%94Yes%2Csince+she%28%29the+chinese+societyA+has+joined+B+joins+C+had+joined+D+joined+%E8%A6%81%E8%A7%A3%E6%9E%90)
Have you known Dr jackson for a long time?—Yes,since she()the chinese societyA has joined B joins C had joined D joined 要解析
Have you known Dr jackson for a long time?—Yes,since she()the chinese society
A has joined B joins C had joined D joined 要解析
Have you known Dr jackson for a long time?—Yes,since she()the chinese societyA has joined B joins C had joined D joined 要解析
D.
since和时间点连用表时间段.joined过去式表示这一动作发生在过去某一时刻.
主句用完成时,也就是:
l have known Dr jackson since she joined the chinese society.
vv
D
since 自从。。 用过去时
D,在现在完成句中,since后面的动词用一般过去时。
A.现在完成时B一般现在时的单三形式C.过去完成时D.一般过去时