4 be動詞《主語が三人称単数》

4-1 This[That] is ～（肯定文・否定文）

---

4-2 Is this[that] ～ ?（疑問文）

---

4-3 What is this[that] ?

---

4-4 He[She] is ～

---

4-5 主語が人名や人を表す名詞の文

---

4-6 Who is ～ ?