Here we are tasked with making a prohibitive sentence from the ‘no smoking’ sign in the picture using the ‘てはいけません’ construction.

We have learned that the word for ‘tobacco’ is ‘たばこ,’ and since it is a direct object in this sentence, we know it needs to be marked with ‘を.’ We have learned that the verb for ‘to smoke/inhale’ is ‘吸う（すう）’; thus, we have everything we need to render the sentence.

As the word ‘吸う（すう）’ most directly means ‘to inhale,’ you must include the word ‘たばこ’ when talking about smoking conventional cigarettes.

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 smoking is prohibited, we answer as follows:
たばこを吸ってはいけません。（たばこをすってはいけません。

Here we are tasked with making a prohibitive sentence from the ‘do not enter’ sign in the picture using the ‘てはいけません’ construction.

We have learned that the word for ‘to enter’ is ‘入る（はいる）’; thus, we have everything we need to render the sentence.

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 entering is prohibited, we answer as follows:
入ってはいけません。（はいってはいけません。）

Here we are tasked with making a prohibitive sentence from the ‘no photographs’ sign in the picture using the ‘てはいけません’ construction.

We have learned that the word for ‘photograph’ is ‘写真（しゃしん）,’ and since it is a direct object in this sentence, we know it needs to be marked with ‘を.’ We have learned that the verb for ‘to take (a photo)’ is ‘撮る（とる）’; thus, we have everything we need to render the sentence.

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 taking photos is prohibited, we answer as follows:
写真を撮ってはいけません。（しゃしんをとってはいけません。）

Here we are tasked with making a prohibitive sentence from the ‘no food’ sign in the picture using the ‘てはいけません’ construction.

Because the construction we are using focuses on verbs, we will reinterpret this sign to mean ‘no eating.’ 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.

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 food or eating is prohibited, we answer as follows:
食べてはいけません。（たべてはいけません。）