Parallelism

1. structure consistency
* -ing, to+v
2. similar function
* object - object
3. no confusing meaning

4. phrase
* and, also, as well as, besides, both...and, neither...nor, nor, not only...but(also), either...or, rather than, whether...or, not...but, from...to

5. not...but(rather) , rather than >> instead of

6. from...to
* from...(up/down)to is Wrong

7. a, b, and c
* a, b, or c
* a, b, as well as c

* there should be and/or/as well as, before the last element of the list, otherwise, it is wrong.