手早い答え
reservar は将来の空きを確保し、alugar は有料の一時使用です。
確実な見分け方は、英語から訳す前に、その単語の働きを見きわめることです。
それぞれの単語の働き
alugar
to rent
Use alugar for paying for temporary use of a home, vehicle, equipment, or other property.
reservar
to reserve or book
Use reservar for holding a room, table, seat, or service for later use.
選び方
- alugar: Choose alugar if the sentence points to paying for temporary use of a home, vehicle, equipment, or other property.
- reservar: Choose reservar if the sentence points to holding a room, table, seat, or service for later use.
例文
Alugamos um carro por três dias.
We rented a car for three days.
Reservei um quarto para sexta-feira.
I booked a room for Friday.
よくある落とし穴
You may reservar a car before the trip and alugar it when the rental begins. The booking is not the rental itself.
文脈の中で練習する
自分の実生活から文を一つ選び、二回書いてみましょう。一度はalugarで、もう一度はreservarで。どちらも成り立ちそうなら、意味の違いを言葉にしてみましょう。