1. Jenny's family are/is following her. She is taking a walk with her family.

2. Yujin is watering plants with a watering can. Her brother is digging with a trowel. Her father is also watering plants with a watering pot. What is Yujin doing? She is watering with her family.

3. Four ducks are swimming in the pond.
4. Four ducks are moving on the pond.

(Would you check the sentences? Correct any errors, please.)

1. family is following

2. Yujin is gardening with her family.
or
Yujin is watering some plants.

3 is better than 4.

1. The correct sentence would be: "Jenny's family is following her. She is taking a walk with her family." (The subject "family" is singular, so the verb should be "is" instead of "are").

2. The sentence is correct as it is! Yujin is watering plants alongside her family members.

3. The sentence "Four ducks are swimming in the pond" is grammatically correct. It accurately describes the action of ducks swimming in the pond.

4. The sentence "Four ducks are moving on the pond" is also grammatically correct. However, it might be more common to say "Four ducks are swimming on the pond" or "Four ducks are floating on the pond" to more accurately convey their action.