有关英语的问题

in可以作介词，也可以作副词。come in 中，in为副词。句意： 老是进来开始上课。
副词开头句子倒装，结构为：副词+动词+主语

我给你倒过来你就不糊涂了：The teacher came in and the class began,
倒装句嘛，顾名思义，倒装。那主语肯定要放在后面，came in放前面。
你这句话是介词也需要倒装，所以是in came
还有呢，我举例子：Out rushed the boy.你说啥意思？

John
takes
a
bus
to
go
to
school(改为同义句）
=John
goes
to
school
on
a
bus.
=John
goes
to
school
by
bus.
再如：
I
go
to
school
by
bike
every
day.
=I
go
to
school
on
a/my
bike
every
day.
=I
ride
my
bike
to
school
every
day.
She
goes
to
work
by
car.
=She
goes
to
work
in
a
car.
=She
drives/takes
a
car
to
work.
总之：on
+
修饰词
+
名词
by
+
名词（单数）

The teacher came in and the class began.