何羽かの鳥は飛ばなかった。
Sentence Analyzer
English Translation
        Some of the birds didn't fly.
    
Furigana
Romanji
        Nan wa ka no tori wa tobanakatta.
    
Words
            
                何
            
            
                (なに、なん)
            
        
        
            what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!
        
    
            
                羽
            
            
                (わ、ば、ぱ)
            
        
        
            counter for birds and rabbits
        
    
            
                か
            
            
                (か)
            
        
        
            indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                鳥
            
            
                (とり)
            
        
        
            bird; bird meat (esp. chicken meat); fowl; poultry
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                飛ぶ
            
            
                (とぶ)
            
        
        
            to fly; to soar; to jump; to leap; to spring; to bound; to hop