What are the rules of plural change of nouns and tense change of verbs?

But German is not a compound word, so the plural form is Germany; Bowman is the surname, the plural is the Bowman. 2) simple complex homomorphism such as deer, sheet, fish, Chinese, Japanese, Li, Jin, yuan, two Li, three mu, four Jin, but

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1. Be verb is.am.are Which words do they use? Which form? (if it is missed, it will not be counted as a score) It is to write out all the words that use is am are and classify them according to the different usages of be verb in 3,
2. It is not am is are, but be You would be much better now if you Be in detail
3. In English sentences, when to use be and when to use am is are
4. When to use be (the prototype of AM is are) in English
5. What do you mean by be and am is are
6. The usage of AM is are in English
7. Am (plural)_____ Come on, will you?
8. What is the plural of is?
9. Which can be used in the plural form TOM and I ___ good friends
10. The plural form of is / am this that ciass bus
11. What are the nouns, verbs and adjectives of the English word "organization"
12. English words about crime should have nouns, verbs and adjectives For example, the noun verb adjective steal the steal thief
13. The usage of verbs, nouns, adjectives and prepositions in English words
14. How to distinguish English words from adjectives, verbs and noun adverbs
15. English translation Three beautiful lights, a picture of my family, enough warm clothes Wear (synonym) Glad (a synonym) Rain (same pronunciation, 5) What is the present participle?
16. English translation For writing a composition I can play erhu Quick, erhu or urheen What is Mao
17. What can you do? I know Chinese Kung Fu
18. English translation Are you good at English? Understand Take the No.5 bus Written expression How many people are there in your school band, and each person's specialty (no less than five sentences)
19. English translation Chinese English translation
20. When the third person singular is the subject, do all the following verbs have to use the third person singular Is the predicate in the third person singular or is all the verbs after the subject in the third person singular