R.He has given me several suggestions, all of them are useful.
I know it is incorrect. However,why is it correct when we change the word "them" to "which" ?
Does " all of which" has the function of "that"?
Not exactly. 'which', like 'that' refers to 'suggestions'.
Without "all of", you have the following, which are correct, but not really what you want:
He has given me several suggestions that are useful.
He has given me several suggestions which are useful.
Here are some correct sentences:
He has given me several suggestions; all of them are useful.
He has given me several suggestions. All of them are useful.
He has given me several suggestions, all of them useful.
He has given me several suggestions, all of which are useful.
He has given me several suggestions which are all useful.
He has given me several suggestions that are all useful.
Note: You can't say ", all of that are useful". You must use which for this.
When the meaning of "looks" is the same as appearance
Her looks are beautiful. Correct.
her looks is beautiful. Wrong
which one is correct?
Does the work "looks" countable? Yes
If using "are" is correct,why? "her looks" just means one person appearance.
One person can have many looks.
She looks good from the front, the back, and from both sides. That's four looks already!
Their appearance is attractive. Yes
Their appearance are attractive. No
Their looks are attractive. Yes
Their looks is attractive. No
Which are correct?
I am still confused about "fill in" and "fill out"
If you're talking about a form, you can use either.
Why we can use two in some situations but some cannot ?
Because we're talking about language.
Student or Learner