Help me check grammar for LS

11. if the answer is one of the given choice (not "yes" or "no"), the question should be:

Which method of grave sweeping would you choose (if given a choice), through online or in person?

"if given a choice" is redundant in meaning and should be omitted.

2015-04-06 23:23:51 補充：
1. Do you know what online grave sweeping is?

2. What makes you know online grave sweeping?
How do you know online grave sweeping?

3. Have you (ever) visited (any) online grave sweeping website (before)?

4. Have you (ever) used online grave sweeping to mourn ancestor?

5. How frequent do you use online grave sweeping?
How many times do you use online grave sweeping within a year?

6. Why do you use online grave sweeping? (correct, no change)

7. Do you think online grave sweeping can pay respects to ancestor? (correct)

8. Do you think online grave sweeping can replace grave sweeping in person?

9. What positive impacts do you think the online grave sweeping brings?
10. What negative impacts do you think the online grave sweeping brings?

Impact on what? impact on morality?

9&10. What are the pros and cons of the online grave sweeping?

What (do you think) are the impacts (that) online grave sweeping can have?

11. Which method of grave sweeping would you choose, through online or in person?

2015-04-06 23:36:57 補充：
5. How frequent do you use online grave sweeping?
Answer: once a month. (equivalent to 12 times yearly)

How many times do you use online grave sweeping within a year.
Answer: 12 times (yearly).

2015-04-06 23:47:05 補充：
9. What do you think are the positive impacts that online grave sweeping can have?
10. What (do you think) are the negative impacts (that) online grave sweeping can have?

"do you think" and "that" can be omitted.

2015-04-06 23:50:36 補充：
9&10. You may just want to ask the "advantage" and "disadvantage" (pros and cons) of using the online grave sweeping for mourning the ancestors.

2015-04-06 23:52:11 補充：
4 & 7. "ancestor" should be plural in number, such as "ancestors".

2015-04-07 05:30:24 補充：
Correction made by Godfrey on Comments:

7. Do you think you can pay your respects to your ancestors by using online tomb sweeping?

2015-04-07 06:54:15 補充：
For the same reason as explained by Godfrey, 7. can also be written as:

Do you think online grave sweeping can be used to pay respects to the ancestors?

2015-04-10 03:10:47 補充：
Longman Dictionary:

6. respects [plural] = polite greetings

~ give/send your respects (to sb)
~ pay your respects (to sb) British English (=make a polite visit)

7. pay your last respects (to sby) = to go to someone's funeral

2015-04-10 03:31:52 補充：
respect 尊敬﹐敬重 (uncountable, singular): (respect for somebody)
~to show respect for ancestors

Do you think online grave sweeping can be used to show respect to your ancestors?

1.Do you know what is online grave sweeping?
2.Which way make you know online grave sweeping?
3.Have you visited online grave sweeping website?
4. Have you used online grave sweeping to mourn ancestors?
5. How often do you use online grave sweeping within a year?
6.Why do you use online grave sweeping?
7. Do you think online grave sweeping can pay your respects to ancestors?
8.Do you think online grave sweeping can replace the actual sweeping?
9. What positive impacts do you think online grave sweeping brings?
10. What negative impacts do you think the online grave sweeping brings?
11.If you were given a choice, either choose online grave sweeping or actual one ?

7. Do you think you can pay your respects to your ancestors by using online tomb sweeping?

Sentence pattern:
One pays one’s respects to someone
Subject 是人, .不是 online tomb sweeping
respects 要 plural

We paid our last respects to our beloved teacher. ~ went to the teacher’s funeral

2015-04-10 02:12:22 補充：
知足常樂 :
坦白說, 亦不明白為何要加 -s
pay respects to someone
小學時老師給一個 list, 例外字, 要死記
weather (天氣)是 uncountable noun (singular), 不可加 -s
除了這 phrase, "in all weathers"

thanks 是 noun, thank 只可做 verb
~ express my thanks.

細佬時用心記, 不想 DC (Detention class)!

1.
Do you know what online grave sweeping is?

11.
If you are given a choice, would you choose online grave sweeping or grave sweeping by yourself?

2015-04-08 21:50:47 補充：
原來 pay someone respects 要 plural，那麼大家要注意了。
謝謝 Godfrey.

伹有時用作 uncountable noun 時就不加 s：
http://idioms.thefreedictionary.com/pay+respect