"Those women were very good."
Translation:वे औरतें बहुत अच्छी थीं।
Do you mean the dot in ' थीं '? It is used when the subject is feminine AND plural (and indicates nasalisation of the vowel in the word) . 'थी' without the dot is used when the subject is feminine and singular. For instance, 'That woman was very good' would be वह औरत अच्छी थी।