The two sides never looked likely to reach an agreement.

`=>` At no time did the two sides look likely to reach an agreeme.

Cấu trúc đảo ngữ với At no time

At no time + trợ động từ + S + V + O

I just had time to put up my umbrella before the rain came down in torrents.

`=>` No sooner had I put up my umbrella than the rain came down in torrents.

Cấu trúc: No sooner + trợ động từ + S + V + than + S + V: Vừa mới … thì …, Ngay sau khi … thì …

At no time did the two sides look likely to reach an agreement.

Cấu trúc: At no time+ trợ động từ + S+ V.

No sooner had she put up her umbellar than the rain came down in torrents.

Cấu trúc: No sooner + auxiliary + S + V + than + S + V: Vừa mới...thì...