他们经常互相帮助。用英文怎么说

所以可以选用其中一个就行了.
或者，例如口语中就不是很严格)
2.
They
often
help
one
another.
(each
other
一般用于两个人之间，不严格时也用于三个人以上“互相”，都表示“经常”1.
They
often
help
each
other.或者：They
frequently
help
one
another.(one
another
一般用于三个人以上“互相”)
often
和
frequently是同义词：They
frequently
help
each
other