There is a necessity for his participation in the success of this project.

He likes to speak using the future tense.

She is struggling to understand the perfect tense in English.

Control characters are used to cause special actions on the computer.

The control rod adjusts the reaction of the nuclear reactor.

He is a person with no visual impairment, and he can see the beautiful scenery.

This material has high elasticity.

His toponymic surname indicates the region from which his family originates.

This beautiful scenery has an eternally unchanging value.

My biological clock is disrupted, and I've been having sleepless nights.