He has no idea...

He has no idea what's at stake here.

He has no idea how to apologize properly.

He has no idea what a mess he's made.

He has no idea how much time he's wasting.

He has no idea what he's missing out on.

He has no idea how to handle this situation.

He has no idea how much his words hurt.

He has no idea what he's talking about.

He has no idea how important this is to me.

He has no idea how to cook a simple meal.

He has no idea how to appreciate good food.

He has no idea what he's missing out on by not trying new cuisines.

He has no idea how to follow a recipe properly.

He has no idea how to make a decent cup of coffee.

He has no idea what it takes to run a successful restaurant.

He has no idea how to eat with chopsticks.

He has no idea how to spice things up in the kitchen.

He has no idea how to choose a ripe fruit.

He has no idea how to pair wine with food.

He has no idea how to take care of his own health.

He has no idea how much exercise he needs.

He has no idea how to listen to his body's signals.

He has no idea how to deal with aches and pains.

He has no idea how important it is to get enough sleep.

He has no idea how to manage stress effectively.

He has no idea how to maintain a balanced diet.

He has no idea how to improve his posture.

He has no idea how to properly stretch his muscles.

He has no idea how to recognize symptoms of illness.

He has no idea how to pack efficiently for a trip.

He has no idea how to navigate through a foreign city.

He has no idea how to book affordable accommodations.

He has no idea how to budget for travel expenses.

He has no idea how to communicate in a different language.

He has no idea how to plan an itinerary.

He has no idea how to handle travel delays.

He has no idea how to adapt to different cultures.

He has no idea how to find authentic local experiences.

He has no idea how to travel responsibly and sustainably.

He has no idea how to get to the airport on time.

He has no idea how to use public transportation.

He has no idea how to read a map.

He has no idea how to drive a manual transmission car.

He has no idea how to parallel park.

He has no idea how to change a flat tire.

He has no idea how to hail a taxi.

He has no idea how to navigate using GPS.

He has no idea how to check the weather forecast before leaving.

He has no idea how to pack light for a short trip.