I think I have these corrct, but I am not sure. Can someone tell me if I am right or wrong?

direct object gerund

The students downplay walking in the rain. (downplay)
We enjoy surfing as a group. (enjoy)
The children adore talking on the internet. (adore)
The residents practice waiting for everyone. (practice)
The passengers avoid crowdin the aisles. (avoid)

direct object infinitival

We began to think of other things to do. (began)
They attempt to study every day of the week. (attempt)
They hope to make their appearance before the end of the month. (hope)
They agreed to go to the hospital at once. (agreed)
I want to make snacks for the party. (want)

I'm sorry, but all of your answers are wrong.

You've identified the verb in each question, but not the direct objects.

Let's analyze the first sentence:
The students downplay walking in the rain.

The gerund "walking" is the direct object of the verb "downplay." The direct object receives the action of the verb and tells WHAT the students downplay.

Please go back and correct your answers and we'll be happy to look at them again.

I am sorry, I was suppose to identify the main verbs then write sentences that used them as gerund direct objects and infinitival direct objects. Do I have the verbs correct?

Yes. You've correctly identified all of the verbs. :-)

To determine if the sentences have the correct direct object gerund or infinitival, let's first understand what each term means.

A gerund is a verb form that functions as a noun and ends in "-ing". It is used to express an action or a state. For example, in the sentence "I love swimming," "swimming" is the gerund.

An infinitive is the base form of a verb preceded by "to". It can also function as a noun, adjective, or adverb. For example, in the sentence "She wants to dance," "to dance" is the infinitive.

Now, let's analyze the sentences you provided:

1. The students downplay walking in the rain. (downplay)
- "Walking" is a gerund here, serving as the direct object. It expresses the action that the students downplay.

2. We enjoy surfing as a group. (enjoy)
- "Surfing" is a gerund here, serving as the direct object. It expresses the activity that we enjoy.

3. The children adore talking on the internet. (adore)
- "Talking" is a gerund here, serving as the direct object. It expresses the action that the children adore.

4. The residents practice waiting for everyone. (practice)
- "Waiting" is a gerund here, serving as the direct object. It expresses the action that the residents practice.

5. The passengers avoid crowding the aisles. (avoid)
- "Crowding" is a gerund here, serving as the direct object. It expresses the action that the passengers avoid.

6. We began to think of other things to do. (began)
- "To think" is an infinitive here, serving as the direct object. It expresses the action that we began.

7. They attempt to study every day of the week. (attempt)
- "To study" is an infinitive here, serving as the direct object. It expresses the action that they attempt.

8. They hope to make their appearance before the end of the month. (hope)
- "To make" is an infinitive here, serving as the direct object. It expresses the action that they hope.

9. They agreed to go to the hospital at once. (agreed)
- "To go" is an infinitive here, serving as the direct object. It expresses the action that they agreed.

10. I want to make snacks for the party. (want)
- "To make" is an infinitive here, serving as the direct object. It expresses the action that I want.

Based on this analysis, it appears that you correctly identified the direct object gerunds and infinitivals in the sentences. Well done!