We have been working on this project for ten months.

It is said that rhesus macaques are very intelligent.

She is always badmouthing people behind their backs.

He is completely nowhere to be seen.

His shadow was stretching long.

I have been studying Japanese for four months.

I have been studying Japanese for three months.

He has changed so much that he is a mere shadow of his former self.

The destruction of the ozone layer has a significant impact on the Earth's climate.

Under the moonlight, his silhouette was projected onto the wall.