人が空を飛ぶことは不可能なことだとかつては考えられた。
Sentence Analyzer
English Translation
        At one time it was thought impracticable for man to fly.
    
Furigana
Romanji
        Hito ga sora o tobu koto wa fukanōna koto da to katsute wa kangaerareta.
    
Words
            
                人
            
            
                (ひと、ヒト)
            
        
        
            man; person; human being; mankind; people; human (Homo sapiens); humans as a species; character; personality; man of talent; true man; another person; other people; others; adult
        
    
            
                が
            
            
                (が)
            
        
        
            indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
        
    
            
                空
            
            
                (そら)
            
        
        
            sky; the heavens
        
    
            
                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.
        
    
            
                飛ぶ
            
            
                (とぶ)
            
        
        
            to fly; to soar; to jump; to leap; to spring; to bound; to hop
        
    
            
                事
            
            
                (こと、こん)
            
        
        
            thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                不可能
            
            
                (ふかのう)
            
        
        
            impossible
        
    
            
                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)
        
    
            
                嘗て
            
            
                (かつて、かって)
            
        
        
            once; before; formerly; ever; former; ex-; never yet; never before; first time; still not happened
        
    
            
                考える
            
            
                (かんがえる)
            
        
        
            to think about; to take into consideration; to ponder; to reflect; to try to come at a conclusion; to think over (something); to intend; to decide (to do); to plan; to come up with; to devise; to scheme; to predict; to anticipate; to expect; to suspect; to doubt; to consider (somebody to be something); to look on
        
    Kanji
Readings: ジン、 ニン、 ひと、 -り、 -と
                        Meaning: person
                    Readings: クウ、 そら、 あ.く、 あ.き、 あ.ける、 から、 す.く、 す.かす、 むな.しい
                        Meanings: empty, sky, void, vacant, vacuum
                    Readings: ヒ、 と.ぶ、 と.ばす、 -と.ばす
                        Meanings: fly, skip (pages), scatter
                    Readings: フ、 ブ
                        Meanings: negative, non-, bad, ugly, clumsy
                    Readings: カ、 コク、 -べ.き、 -べ.し
                        Meanings: can, passable, mustn't, should not, do not
                    Readings: ノウ、 よ.く
                        Meanings: ability, talent, skill, capacity
                    Readings: コウ、 かんが.える、 かんが.え
                        Meanings: consider, think over