When the committee had met last week it is decided that they approved constructing of a new retiring centre for benefiting Seniors and there family’s which had been living in a surrounding area.
1. Verb tense and consistency: The verb “met” needs to be in the simple past; it happened last week which is a definite time in the recent past. The following verb also needs to be in the simple past and in the active voice: “is decided’ should be changed to “decided.” Also, change “had been living” to “are living” as they are still in the area; they didn’t move away while waiting for the retirement centre to be built.
2. Noun-pronoun agreement: “Committee” is a collective noun. Unless the individual members of the group are emphasized, it is singular; “it” is correct.
3. Incorrect wording: change “that they approved constructing” to “to approve construction.”
4. Word form error: “Retiring” is the present participial adjective. Here you need a noun form to modify “centre”. Use "retirement."
5. Gerund or infinitive: Instead of “for benefiting” use “to benefit.”
6. Word confusion: “There” is an adverb of place; here you need the possessive adjective “their”.
7. Plural form: The plural of “family” is “families”; it’s not a possessive.
8. Relative pronoun: When referring to people use “who” not “which.”
9. Article usage: When referring to something specific, use “the”, not “a.”
10. Capitalization: “Seniors” is a not a proper noun; do not use a capital.
11. Punctuation: After an introductory phrase or clause, use a comma.
When the committee met last week, it decided to approve construction of a new retirement centre to benefit seniors and their families who are living in the surrounding area.