- He built the treehouse all by himself._Hiː bɪlt ðə ˈtriː.haʊs ɔːl baɪ ˌhɪmˈself. Hi bilt de trihaus ol bai himself.L'ha costruita da solo la casetta sull'albero.Hiː bɪlt ðə ˈtriː.haʊs ɔːl baɪ ˌhɪmˈself. Hi bilt de trihaus ol bai himself.
He built the treehouse all by himself.