Can I say,
(A) The boy just joined in the singing.
(b) It was time to have lunch.
(c) Last Friday's weather was fine / good / a sunny day.
Vincent Teo wrote: Can I say, (A) The boy just joined in the singing. Yes, and you may, also. (b) It was time to have lunch. correct (c) Last Friday's weather was fine / good / a sunny day / sunny.
(A) The boy just joined in the singing. Yes, and you may, also.
(b) It was time to have lunch. correct
(c) Last Friday's weather was fine / good / a sunny day / sunny.
a b are ok.
c a sunny day not appropriate in this sentence. Just 'sunny' on its own is ok.