When should I add ing after a verb in English By the way, teach me how to remember a word quickly

You know that's going on
Or to be carried out, you can add ing
There is also a special case, the verb at the beginning of a sentence, 90% may be to add ing

RELATED INFORMATIONS

1. Which words in English are followed by the verb ing?
2. What are the verbs followed by ing in English
3. What is the rule of adding ed to verbs in English?
4. Under what circumstances do English verbs add ing or ED or s? Under what circumstances do they double write when adding ing? Are there any special phrases like go swimming? Under what circumstances should we remove "ing" from "going swimming"?
5. The law of verb plus ing
6. The rule of verb ing duodian
7. Which verbs add ing?
8. Why add the verb ing after like
9. What word is followed by the verb ing? For example: like doing, you can write a like to me The more, the better! the sooner the better!
10. Do you want to add ing to the verb after by
11. Why is ing added after these verbs 1.I'm visiting my friends. 2.He isn't writing a postcard. 3.Is she enjoying her visit? 4.Are they buying postcards? Are these sentences in the present continuous tense? If so, where can I tell? If not, what is the rule of adding ing after verbs? These sentences include negative sentences and interrogative sentences, and the verb is also added with ing. Should the verb keep its original form in negative sentences and interrogative sentences? Under what other circumstances do verbs need to change their ing forms?
12. Dear English proficient brothers and sisters, help me write 5 sentences in English present continuous tense~ Everyone proficient in English Big Brother Big Sister, help me write 5 English sentences in the present continuous tense, junior one level is OK, don't bother ~ it's homework, so be serious~
13. Change the following sentences into English sentences in the present continuous tense tom can speak Chinese we have four lessons Do you like this book? his father can help them. Danny open the door
14. What do English verbs mean by the simple present tense and the present progressive tense? Please make it simple. It's better to give an example "Do" is a simple present tense
15. Are there any irregular verbs in the present tense? If so, please list them
16. The transformation of verbs in the general present tense, the general past tense, the present progressive tense and the general future tense What's the change of tense verbs between the first person tense and the second person tense and the third person tense
17. Find the present continuous tense, the general present tense and the general past tense of 30 English verbs Hurry!
18. On the general present tense, the general past tense, the present continuous tense, etc The following questions may be useful to the present tense, the past tense, the present continuous tense, the present perfect tense and the past continuous tense I don't know which tense to use, so I'll write down why I choose this one, Sometimes we (play) cards on Friday nights. The children (play) outside when the fire started. The mail never (come) on Sundays. We (stay) at the Biltmore Hotel for a few days last year. When you (call)me yesterday,I (type) a term paper.
19. Verbs in the simple present tense, the present continuous tense and the simple past tense get talk eat go study have (simple present tense, present continuous tense and simple past tense)
20. Do instantaneous verbs have the present continuous tense? For example, he is putting on his coat····························