彼が約束を破ったのは、なぜだと思いますか。
Sentence Analyzer
English Translation
        What do you think made him break his promise?
    
Furigana
Romanji
        Kare ga yakusoku o yabutta no wa, naze da to omoimasu ka.
    
Words
            
                彼
            
            
                (かれ)
            
        
        
            he; him; his; boyfriend
        
    
            
                が
            
            
                (が)
            
        
        
            indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
        
    
            
                約束
            
            
                (やくそく)
            
        
        
            promise; agreement; arrangement; one's word; contract; pact; appointment; engagement; date; convention; rule; destiny; fate
        
    
            
                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.
        
    
            
                破る
            
            
                (やぶる)
            
        
        
            to tear; to break; to destroy; to break through (opponent's defense etc.); to breach; to defeat; to beat; to shatter (dream, peace, etc.); to disturb; to violate (a rule etc.); to break (a promise etc.); to break (a record)
        
    
            
                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
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                何故
            
            
                (なぜ、なにゆえ)
            
        
        
            why; how
        
    
            
                だ
            
            
                (だ)
            
        
        
            be; is; indicates past or completed action; indicates light imperative
        
    
            
                と
            
            
                (と)
            
        
        
            if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
        
    
            
                思う
            
            
                (おもう)
            
        
        
            to think; to consider; to believe; to think (of doing); to plan (to do); to judge; to assess; to regard; to imagine; to suppose; to dream; to expect; to look forward to; to feel; to desire; to want; to recall; to remember
        
    
            
                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
        
    Kanji
Readings: ヒ、 かれ、 かの、 か.の
                        Meanings: he, that, the
                    Readings: ヤク、 つづ.まる、 つづ.める、 つづま.やか
                        Meanings: promise, approximately, shrink
                    Readings: ソク、 たば、 たば.ねる、 つか、 つか.ねる
                        Meanings: bundle, sheaf, ream, tie in bundles, govern, manage, control
                    Readings: ハ、 やぶ.る、 やぶ.れる、 わ.れる
                        Meanings: rend, rip, tear, break, destroy, defeat, frustrate
                    Readings: シ、 おも.う、 おもえら.く、 おぼ.す
                        Meaning: think