be alert

Examples (10)

• Climbers need to be alert to possible dangers.
• There was a noise outside and he was suddenly alert.
• You will need to be alert during the entire exam.
• Drivers are always alert for pedestrians crossing the street.
• Being alert to changes in the market is key to our success.
• Be alert! There's a strange car parked on our street.
• While he was on watch, the soldier was constantly alert for any movement.
• She has been more alert ever since the caffeine kicked in.
• If you are not mentally alert, you might miss important details.
• Are you alert enough to drive after such a long day?