we'll is the short form of 'we will' — and sometimes of 'we shall', though almost nobody uses 'shall' this way now outside of formal British English.

we'll is是 the short form of 'we will'「we will」的縮短形式——and sometimes of 'we shall'有時也是「we shall」的，though不過 outside of formal British English除了正式的英式英文，almost nobody uses 'shall' this way now現在幾乎沒有人這樣用 'shall' 了。

It is used for the future: what we are going to do, what we predict, what we promise or agree to. 'We'll call you tomorrow.' 'We'll be late.' 'We'll see.' In speech, English speakers use the short form nearly all the time; saying 'we will' in full puts heavy stress on the will, which makes it sound like insistence or a firm promise — 'We WILL finish this today.' So the short form is normal and the long form is the marked one.

It它 is used for the future用來講未來：what we are going to do我們要做的事、what we predict我們預測的事、what we promise or agree to我們答應或同意的事。'We'll call you tomorrow.'我們明天打給你。'We'll be late.'我們會遲到。'We'll see.'再看看吧。In speech口語裡，English speakers說英語的人 nearly all the time幾乎隨時都 use the short form用縮寫；saying 'we will' in full把 'we will' 完整說出來，puts heavy stress on the will會把重音重重放在 will 上，which makes it sound like這讓它聽起來像 insistence or a firm promise堅持或很硬的承諾——'We WILL finish this today.'我們今天「一定」要做完。So所以 the short form縮寫 is normal才是正常的，and the long form is the marked one完整形反而是特別的那個。

In writing, use we'll in emails, messages and anything friendly; keep 'we will' for formal writing like reports and contracts. Say it as one syllable, /wiːl/ — it sounds the same as 'wheel'.

In writing書面上，in emails, messages and anything friendly在電子郵件、訊息和任何輕鬆友善的文字裡 use we'll用 we'll；for formal writing like reports and contracts報告、契約這類正式寫作 keep 'we will'則保留 'we will'。Say it把它唸成 as one syllable一個音節，/wiːl/——it sounds the same as 'wheel'跟 'wheel' 同音。