Hello Mr Flynn
I'm studing English, I'm not Teacher, I'm from Mexico.
In Quiz:Relative Pronouns 2 - Answers, I know this one of the most infamous grammar rules(see Maxwell and Clandfield from www.onestopenglish.com)
When I made the quiz, I choose several times pronoun THAT. It seems it's easy and we can use "what ever we want" the pronoun THAT.
I found in others web pages , explanations about uses of pronouns, please
Rerefence 1 : http://www.onestopenglish.com/englis...ve_clauses.htm
Reference 2: http://perso.wanadoo.fr/francis- david/EnglishOnLine/GrammarAndHelp/RelativePronoun/RelPronDoc.htm
At last, I understood, there are defining relative clauses and no-defining realtive clauses; Furthermore , there are sentences where the pronouns acts as a subject (TYPE A) and acts as an object (type B).
When we have a sentence type A, we use: WHO or THAT or ,WHO and ,Which (with commas to indicate non-defining realtive clauses).
When we have a sentence type B, we use 0 (that) or 0 (that) or , WHOM
and , WHICH (with commas to indicate non-defining relative clauses)
According with sumary in Reference 2, then in exercises Q2,Q3.Q5,Q11,Q15 and Q23 , it would be better use WHO, because we are talking about persons, of course we can use THAT. but it is not usual . Isn't it?.
In exercises Q4,Q5,Q9,Q28 and Q33, We might no writting pronoun THAT, because the sentence has subject and verb, we use relative pronoun as "object" (see reference 1 and 2)
Mr Flynn, Could you help me If I were wrong in these topics?
From México City
I am sorry for not rep;lying earlier, but I am travelling and using different computers and somehow I missed this. You are quite right- 'that' can be left out in those questions.
All the best,