变疑问句时句中有哪些词可提前?

变疑问句时句中有哪些词可提前?
变疑问句时句中有哪些词可提前?

变疑问句时句中有哪些词可提前?
助动词,情态动词
can
may
must
need
dare
would
should
shall
do/does
am/is/are
was/were
should
may
might
will
had
ought
多谢你的问题!

be动词和助动词do,have，can等

系动词和助动词一般要前置。 如： Are you student?其中的ARE是系动词。Do you like English? 其中的DO是助动词。