She'll is how we write and say she will when we are talking at normal speed. The two words squeeze together: she + will → she'll.

She'll she'll is是 how we write and say she will我們口語和書寫she will的方式 when we are talking at normal speed當我們用正常速度說話時。The two words這兩個字 squeeze together黏在一起：she + will she加will → she'll變成she'll。

In older or very formal English it can also stand for she shall, but in the English you actually hear it is she will almost every time — plans, promises, guesses about the future: She'll be late. She'll help you.

In older or very formal English在較老或非常正式的英文裡, it它 can also stand for也可以代表 she shall she shall, but but in the English you actually hear在你實際聽到的英文裡 it它 is幾乎每次都是 she will she will almost every time — plans, promises, guesses about the future計畫、承諾、對未來的猜測：She'll be late She'll be late。She'll help you She'll help you。

This is the everyday form. In careful school writing, teachers sometimes want the full she will; in speech, she'll is the natural one.

This這 is就是 the everyday form日常的用法。In careful school writing在嚴謹的學校寫作裡, teachers老師 sometimes有時 want要 the full she will完整的she will；in speech在口語裡, she'll she'll is是 the natural one自然的說法。

The apostrophe is doing a job: it shows letters have dropped out.

The apostrophe這個撇號 is doing a job有它的作用：it它 shows顯示 letters have dropped out有字母被省略了。

Though actually, on a quick glance it can look like shell (the hard cover of an egg or a sea creature). That is a different word.

Though actually不過事實上, on a quick glance快速一瞥 it它 can look like可能看起來像 shell shell（the hard cover of an egg or a sea creature蛋殼或海洋生物的硬殼）。That那 is是 a different word不同的字。