文を書くときには、ふつう大文字で始め、ピリオド（.）、または感嘆符（!）、疑問符（?）、で終わる。

tbd

When writing a sentence, generally you start with a capital letter and finish with a period (.), an exclamation mark (!), or a question mark (?).

When you write a sentence, it normally starts with an upper-case letter and ends in a period (.), an exclamation mark (!) or an interrogation mark (?).