my

This is my pen.

【Translation】This is my pen. 【Explanation】The sentence is structured as [Subject (This) + be-verb (is) + Possessive (my) + Noun (pen)]. The correct order is 'This is my pen.'

【和訳】これは私のペンです。 【解説】語順は【指示代名詞主語 (This) ＋ be動詞 (is) ＋ 所有格 (my) ＋ 名詞 (pen)】となります。正しい文は「This is my pen.」です。