1. How do I know if -ed
need to be added or not?
2. How do I know if -ed
needs to be added or not?
Note that, if you can replace -ed with 'it', then it's singular, so it takes a singular verb:
-ed need to be replaced.
It need
s to be replaced.
-ed needs to be replaced.
Main clause
"I" is the subject and "know" is the verb
Dependent clause
"-ed" is the subject (i.e., it) and "needs" is the verb
3. How do I know if I need -ed added or not?
Dependent clause
"I" is the subject and "need" is the verb. "-ed" functions as the verb's object:
I need
-ed (to be) added (by someone) or not. (Passive structure)
Does the article 'a' modify 'damage'? I know sometimes it does and sometimes it doesn't. How do I know this? Could you give me some examples please?
Are these correct?
4. This is a damage car.
5. This is a damaged car.
The article/determiner "a" modifies the noun "car", not the adjective "damaged". The adjective just happens to occur between the two. :wink: "a" never modifies adjectives.
6. In addition, brand name or brand-name is a compound adjective, meaning name of a brand.
7. In addition, brand name or brand-name is a compounded adjective, meaning name of a brand.
I'm not sure I understand what you're asking so please forgive me if I'm giving you the wrong reply. The word
brand name has two spellings: 1) Without a hyphen (brand name) and 2) with a
hyphen (brand
-name). The hyphen tells us that 'brand' and 'name' go together as a set pair. :wink:
Do these make sense?
8. He learns how to drive the car today.
9. He learned how to drive the car today.
8. is another way of saying, "He is going to learn how to drive today" (Future). 9. refers to the past (i.e., the time before now, say, this morning).
10. This is a double sided cd.
11a. This is a double side cd.
11b. This cd is double sided.

12. This is a double-side cd.
13. This is a double-sided cd.
With or without the hyphen is OK, but the hyphen helps.
Note, "cd" should be capitalized. It's an acronym: Compact Disc (CD)
All the best,
