Ex. 21
1. These are ships.
2. These are men.
3. These are sails.
4. These are sailors.
5. These are children.
6. These are decks.
1. Those are seamen.
2. Those are bridges.
3. Those are pictures.
4. Those are maps.
5. Those are ports.
6. Those are women.
ex. 22
1. This is a book. Is this a book? This is not a book.
2. These are decks. Are these decks? These are not decks.
3. This is a map. Is this a map? This is not a map.
4. These are sailors. Are these sailors? These are not sailors.
5. This is a tall ship. Is this a tall ship? This is not a tall ship.
6. This is an old book. Is this a an old book? This is not an old book.
7. These are seamen. Are these seamen? These are not seamen.
ex. 23
1. is
2. is
3. are
4. are
5. is
6. is
7. are
8. are