GMAT OG-SC- Twice vs Double usage

[amir_hatef]

Hi all,
I need clarification on the GMAT usage b/w TWICE & DOUBLE, I could not, so kindly want you to explain this part in detail for me. I reviewed previous explanations on manhattangmat forums and some other experts on beatthegmat BUT still I can not answer questions on this part correctly at all!

I have read that in GMAT Double mostly tested as a VERB, also twice generally is a adverb and double is an adjective based on OXFORD English Grammar book but I really confused these two simple rules and want you to elaborate more in depth for me if possible. It is written that these are predeterminers: twice, double and.... but there are bit lot examples on GMAT Real exams(OG12th #72 &...) tested and I have difficulty on them due to not having a consolidated and integrated rule with examples on these enable me to answer these kind of questions simply.

In advance I really appreciate your help.

Nazar: Please benefit us by your deep explanation. Thanks.

[Jim@Grockit]

Hi all,
I need clarification on the GMAT usage b/w TWICE & DOUBLE, I could not, so kindly want you to explain this part in detail for me. I reviewed previous explanations on manhattangmat forums and some other experts on beatthegmat BUT still I can not answer questions on this part correctly at all!

I have read that in GMAT Double mostly tested as a VERB, also twice generally is a adverb and double is an adjective based on OXFORD English Grammar book but I really confused these two simple rules and want you to elaborate more in depth for me if possible. It is written that these are predeterminers: twice, double and.... but there are bit lot examples on GMAT Real exams(OG12th #72 &...) tested and I have difficulty on them due to not having a consolidated and integrated rule with examples on these enable me to answer these kind of questions simply.

In advance I really appreciate your help.

Nazar: Please benefit us by your deep explanation. Thanks.

Because "twice" is an adverb, it can modify verbs, while "double" cannot. She talked to him twice last week. I can't think of a way to use "double" to express the same idea.

"Double" is a verb (He doubled his salary over a period of five years) or an adjective (He bought a double bed) or (rarely) an adverb (She was bent double with pain) or noun (I swear I saw your double at the mall yesterday while you were out of town). Note that the adverb form of "double" is not usually interchangeable with "twice" -- "double" as an adverb means something more like "in pairs" or "in half", where "twice" means "two times"; you can, however say "double/twice the amount."