How to practice english uses for (GMAT®-SC)?

[Manojksh9]

Please tell me some ways of practicing American English usage. My native language is not english. I have gone thru Manhattan SC guide, but still only getting 60% correct in practice. I am facing problem in usage of ....> Active and Passive
> Modifier
> Tense uses
> Tense sequence
> Comparisions
> Uses of parallelism
> IDIOMs or American style of writing
Overall, i want to study and practice more grammar part before actually practicing a lot of SC Qs.
Thanks in advance for your kind help or suggestions.

[Mister Micawber]

I suggest that you Google each of those phrases, which will take you to grammar websites where you can read many examples.
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Native English teacher at Mister Micawber's