Common Mistakes :  Both

pronoun

.BAD: Both of them have not apologized yet

.GOOD: Neither of them has apologized yet

.BAD: Both the husband and the wife aren’t reliable

.GOOD: Neither the husband nor the wife is reliable

.BAD: Anne and John both are scientists

.GOOD: Anne and John are both scientists

BAD: Two of the biggest firms are Apple and IBM, which both are in the computer business

GOOD: Two of the biggest firms are Apple and IBM, which are both in the computer business