❶泳ぐ; 泳いで渡わたる
swim across the river
♔基本swim across the river
川を泳いで渡る
⦣ swim＋前置詞＋名詞.
swim to the other side of the river
swim to the other side of the river
川の向こう岸へ泳いで行く
swim on one's back
swim on one's back
背泳ぎをする
swim three miles
swim three miles
3マイル泳ぐ
Bob swims very well. (=Bob is a very good swimmer.)
Bob swims very well. Bob is a very good swimmer.
ボブはとても泳ぎがうまい.
Bob swam across the lake.
Bob swam across the lake.
ボブは湖を泳いで渡った.
Some men and women have swum across the English Channel—twenty miles of cold rough water!
Some men and women have swum across the English Channel—twenty miles of cold rough water!
（今までに）何人かの男女がイギリス海峡かいきょうを泳いで渡った—20マイルの冷たい荒海あらうみを!
⦣ 現在完了かんりょうの文. have助動❷
go swimming
go swimming
泳ぎに行く
⦣ swimming は現在分詞. go doing は「～しに行く」.
The children are swimming in the river.
The children are swimming in the river.
子供たちは川で泳いでいる.
⦣ 現在進行形の文. are助動❶
What's that black thing swimming in the water?
What's that black thing swimming in the water?
水の中で泳いでいるあの黒いものは何ですか.
⦣ swimming は現在分詞（泳いでいる～）で thing を修飾しゅうしょくする.
Swimming in this river is dangerous.
Swimming in this river is dangerous.
この川で泳ぐことは危険です.
⦣ 動名詞 Swimming （泳ぐこと）は文の主語.
