Present, Future 厳しい is [x] 厳しくない is not [x] Past 厳しかった was [x] 厳しくなかった was not [x] Te-form, Continuative 厳しくて is [x] and... 厳しくなくて is not [x] and... Provisional 厳しければ if it is [x] 厳しくなければ if it is not [x] Conditional 厳しかったら when/if it is [x] 厳しくなかったら when/if it is not [x] Adverbial 厳しく [x]-ly Noun form 厳しさ [x]-ness