Grammar fix

reach a conclusion

decide

to make a decision or form an opinion after thinking about something carefully or discussing it with others.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

After looking at all the evidence, the police reached the conclusion that it was an accident.study
In my opinion, it’s important to consider all the facts before reaching a conclusion about someone’s behavior.IELTS speaking

Pattern: reach a/the conclusion (that) + clause

WrongWe reached to a conclusion.

RightWe reached a conclusion.

'Reach a conclusion' — no 'to' (reach is transitive here).

Patternreach a/the conclusion (that) + clause

Choose the version that sounds natural in speech.

Stiff After deliberation, we arrived at a final determination.

Natural We reached a conclusion.

'Arrived at a final determination' is legalistic; 'reach a conclusion' is the natural collocation.

Words that usually travel with it.

reach a conclusion
reach a conclusioncome to a conclusiondraw a conclusionjump to conclusions

Do not confuse with 'draw a conclusion,' which is similar but often used in more formal or written contexts.