今後気をつけなくてはなりません。
Sentence Analyzer
English Translation
        You must be careful from now on.
    
Furigana
Romanji
        Kongo ki o tsukenakute wanarimasen.
    
Words
            
                今後
            
            
                (こんご)
            
        
        
            from now on; hereafter
        
    
            
                気
            
            
                (き)
            
        
        
            spirit; mind; heart; nature; disposition; motivation; intention; mood; feelings; atmosphere; essence
        
    
            
                を
            
            
                (を)
            
        
        
            indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
        
    
            
                点ける
            
            
                (つける)
            
        
        
            to turn on; to switch on; to light up
        
    
            
                ば
            
            
                (ば)
            
        
        
            if ... then; when; and; why don't you...?; the more (one does something); because; since