Quantity + も
Emphasize that an amount is surprisingly large
You'll be able to show surprise that a number or amount is as large as it is.

旅行で写真を百枚も撮りました。
ryokou de shashin o hyakumai mo torimashita.
What do you think this sentence means?
We took as many as a hundred photos during the trip.
React to a surprisingly large amount
A quantity followed by も presents the amount as larger than expected. It expresses the speaker’s evaluation, not an objective definition of “a lot.”
二時間も待ちました。
nijikan mo machimashita.
I waited for a whole two hours.
Form and use Quantity + も
Place も after the full amount and counter. This differs from additive も meaning “also.” The same number can sound large or small depending on the situation.
二時間も待ちました。
nijikan mo machimashita.
I waited for a whole two hours.
このかばんは一万円もします。
kono kaban wa ichiman'en mo shimasu.
This bag costs as much as ten thousand yen.
駅で電車を一時間も待ちました。
eki de densha o ichijikan mo machimashita.
I waited a whole hour for the train at the station.
昨日はコーヒーを五杯も飲んでしまいました。
kinou wa koohii o gohai mo nonde shimaimashita.
I drank as many as five cups of coffee yesterday.
このホテルは一泊五万円もします。
kono hoteru wa ippaku goman'en mo shimasu.
This hotel costs a whopping 50,000 yen a night.
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