Here we are tasked with making a prohibitive sentence about a location of our choosing. We will say that sleeping in class is prohibited.

We have learned that the word for ‘class’ is the English derived word ‘クラス,’ and since it is the location of an action in this sentence, we know it needs to be marked with ‘で.’ We have learned that the verb for ‘to sleep’ is ‘寝る（ねる）’; thus, we have everything we need to render the sentence.

In Japanese, we use ‘クラス’ to talk about the classroom or the event that takes place there, while we use ‘授業（じゅぎょう）’ to refer only to lessons. In English, the word ‘class’ covers both these concepts.

To conjugate a verb into the ‘てはいけません’ construction, we find the て-form of the verb by determining which class and subclass of verb it belongs to and conjugating accordingly (please refer to Page 150-1 of your Genki I textbook if you need a reminder). Once we have done this, we append the ‘てはいけません’ construction to the end of the て-form.

To say that sleeping in class is prohibited, we answer as follows:
クラスで寝てはいけません。（クラスでねてはいけません。）

Here we are tasked with making a prohibitive sentence about a location of our choosing. We will say that drinking alcohol at the bank is prohibited.

We have learned that the word for ‘bank’ is ‘銀行（ぎんこう）,’ and since it is the location of an action in this sentence, we know it needs to be marked with ‘で.’ We have learned that the word for alcohol is ‘お酒（おさけ）,’ and that the verb for ‘to drink’ is ‘飲む（のむ）’; thus, we have everything we need to render the sentence.

In English, if you were to see a sign at the bank that read ‘drinking is prohibited,’ you would likely assume that the sign refers to alcoholic drinks. In Japanese, the verb ‘to drink’ alone does not suggest the consumption of alcohol as it does in English.

To conjugate a verb into the ‘てはいけません’ construction, we find the て-form of the verb by determining which class and subclass of verb it belongs to and conjugating accordingly (please refer to Page 150-1 of your Genki I textbook if you need a reminder). Once we have done this, we append the ‘てはいけません’ construction to the end of the て-form.

To say that drinking alcohol at the bank is prohibited, we answer as follows:
銀行でお酒を飲んではいけません。（ぎんこうでおさけをのんではいけません。）

Here we are tasked with making a prohibitive sentence about a location of our choosing. We will say that eating is prohibited at the library.

We have learned that the word for ‘library’ is ‘図書館（としょかん）,’ and since it is the location of an action in this sentence, we know it needs to be marked with ‘で.’ We have learned that the verb for ‘to eat’ is ‘食べる（たべる）’; thus, we have everything we need to render the sentence.

In English, if you were to see a sign at the bank that read ‘drinking is prohibited,’ you would likely assume that the sign refers to alcoholic drinks. In Japanese, the verb ‘to drink’ alone does not suggest the consumption of alcohol as it does in English.

To conjugate a verb into the ‘てはいけません’ construction, we find the て-form of the verb by determining which class and subclass of verb it belongs to and conjugating accordingly (please refer to Page 150-1 of your Genki I textbook if you need a reminder). Once we have done this, we append the ‘てはいけません’ construction to the end of the て-form.

To say that eating at the library is prohibited, we answer as follows:
図書館で食べてはいけません。（としょかんでたべてはいけません。）