Question

现在完成时的肯定句 否定句 一般疑问句 特殊疑问句及标志词

Answer 1

①肯定句：主语+have/has+动词的过去分词+宾语.
②否定句：主语+haven't/hasn't+动词的过去分词+宾语.
③一般疑问句：Have/Has+主语+动词的过去分词+宾语？
④特殊疑问句：特殊疑问词或词组+一般疑问句（have/has+主语+过去分词+其他）？
常见的标志词：already（肯定），yet（否定或疑问），just,before,recently,still,lately,never，ever,
twice,
on
several
occasion,in
the
past
few
days/weeks/months/years,(up
to)these
few
days/weeks/months/years,
this
morning/week/month/year,
just,
up
to
present,
so
far,up
to
now,till
now,since+时间