Thank you 

I should also add that some special verbs are followed by verb-ing forms (gerund form) or to + infinitive. Some, like want, decide, agree, are always followed by to + infinitive. Some, like look forward to, enjoy, finish, are always followed by verb-ing forms.

I decided to turn off the computer and go home. I would finish writing the report tomorrow.

I'm looking forward to hearing from you.

Past participle is used in present perfect, past perfect, and passive voice, future perfect tense, in conditional sentences or as an adjective.

Past participle as an adjective:

Swollen eyes

Broken plate

Ruined cake

Past participles used in verb tenses:

I had cooked my launch before my mom arrived home.......> past perfect (had+ past participle).

I have visited China several months ago. ....> present perfect (have/has+ past participle).

I will have changed my car by the end of next year.......> future perfect tense (will+ have+ past participle).

Passive voice:

Someone was broken my window when I came back home.

English is spoken by millions of people around the world.

I won't go through some complicated sentences. Past participle has a lot of usage in the English language.

To decide is the present tense, while decided is used in the past tense or as a past participle.

I decided to lose weight......> past tense.

I've decided to lose weight....> present perfect (have/has+ past participle).

中文意思的去和要，有时候没有太大的区别。要  有hope and want的意思。想要代表有那个想法。去 从某地到某地、除掉and so on.和我说的决定要做某事和去做某事没有太大关联。是我句子没有翻译清楚。I dont know. to decide doing sth and decid to do sth 有什么不同。Can you understand  that translating in Chinese?