I am very confusing with gerund and infinitive and participles

[mrlocom]

For the following sentences, which are gerunds, infinitives, present participles and past participles?

1. Committing suicide is often on the minds of increasing numbers of depressed people who are under medical supervision but not taking medication.

2. To avoid trouble for not doing his homework on time, Peter decided he could attend class the following day but not that evening.

3. For staff selling real estate in a declining economy, a common condition is feeling stressed-out most of the time.

Thanks!

[Buddhaheart]

1. Committing (~ gerund ~ verb-noun)suicide is often on the minds of increasing (~ present participle functioning as an adjective ~ verbal adjective)numbers of depressed people who are under medical supervision but not taking (~ present participle, together with ‘are’ forming the present continuous tense) medication.

2. To avoid (infinitive ~ verb-noun) trouble for not doing (~ gerund taking ‘homework’ as its object) his homework on time, Peter decided he could attend class the following (~ present participle functioning as an adjective qualifying the noun ‘day’) day but not that evening (~ noun).

3. For staff selling (~ present participle functioning as an adjective qualifying the noun ‘real estate’) real estate in a declining (~ present participle functioning as an adjective qualifying the noun ‘economy’) economy, a common condition is feeling (~ present participle, together with ‘is’ forming the present continuous tense) stressed-out most of the time.

[mrlocom]

Thanks!