“疑问句中的指示代词：this ， that 回答时要用： it 代替 these ，those 要用 they 代替”怎么理解，请举例解答
is this your pen 按照疑问句，否定句，肯定句 祈使句 感叹句
is this your pen 按照疑问句，否定句，肯定句 祈使句 感叹句 一般疑问句Is 一般疑问句Is this your pen？否定句 This is not your pen.肯定句 This is your pen.祈使句 祈使句一般有三个特点：没有主语（主语通常是you，而且省略）；。
用can造句（否定句，肯定句，一般疑问句）各2句。 can造句：否定句：I can't speak English.I can't see it.肯定句：I can eat this hamburgerI can do this.一般疑问句：can I help you？can you bring some book for me？。
