Hiya there. I would strongly agree with the first phrase, ""I used to smoke two packs of cigarettes."
2 ธันวาคม 2014
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The correct form would be, "I used to smoke two packs of cigarettes."
More commonly, I'd add a bit to say "I used to smoke two packs of cigarettes a day."
2 ธันวาคม 2014
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Your question should be written as "I wonder how to say this right." Or " I wonder how to say this correctly."