jlpt-boi / JLPT N5 / Grammar / 〜てはいけない
〜てはいけない
The sentence states a rule banning smoking here, and only 〜てはいけません expresses prohibition.
Tested at JLPT N5 — 10 practice questions below.
Practice 〜てはいけない →入る → 入って + はいけません gives 'you must not enter this room.' The 入っ before the blank is the start of the te-form 入って, which only option 4 completes as a prohibition. The other endings all require the masu-stem 入り and would mean 'want to enter,' 'entered,' or 'won't you enter' — none is a prohibition.
ここでたばこを吸っ＿＿＿。
Answer: てはいけません · Try this question →
ここでは ___ 。
Answer: たばこを · Try this question →
この部屋に入っ＿＿＿。
Answer: てはいけません · Try this question →