Questions & Answers about Ich bin heute zufrieden.
In German, ich is normally written with a lowercase i.
In your sentence, Ich bin heute zufrieden, Ich is capitalised only because it is the first word of the sentence. That follows the same rule as in English: the first word of a sentence is capitalised.
So:
- At the beginning of a sentence: Ich bin müde.
- In the middle of a sentence: Heute denke ich an dich.
German does not capitalise ich the way English capitalises I everywhere.
Bin is the first‑person singular form of the verb sein (to be).
Present tense conjugation of sein:
- ich bin – I am
- du bist – you are (informal singular)
- er / sie / es ist – he / she / it is
- wir sind – we are
- ihr seid – you are (informal plural)
- sie sind – they are
- Sie sind – you are (formal singular and plural)
So in Ich bin heute zufrieden, bin is the correct form for ich.