He knew it would be a long and difficult journey.

Meaning: The scientist had information that told him it would not be easy or quick to solve the mysteries of the planet.

Choice of Words: Knew means to have information or understanding about something. Would is used to talk about something that is likely to happen in the future. Long means lasting for a long time. Difficult means not easy to do or understand. Journey means a trip or a period of traveling.

Alternative Expressions

He was aware that the journey ahead would be lengthy and challenging.

Meaning: This sentence tells us that the person knew that the trip they were going to take would be long and hard to do.

Choice of Words: He refers to a person, was aware means to have knowledge or understanding, that is used to introduce a clause, the journey ahead refers to the trip that is going to happen in the future, would be is used to express a future state or condition, lengthy means of great length or duration, and is used to connect two words or phrases, challenging means difficult to do or achieve.

He understood that the upcoming trip would require significant time and effort.

Meaning: This sentence tells us that the person knew that the trip they were going to take would be long and hard to do.

Choice of Words: He refers to a person, understood means to have knowledge or understanding, that is used to introduce a clause, the upcoming trip refers to the trip that is going to happen in the future, would require means to need or necessitate, significant means important or meaningful, time refers to the period during which something happens or exists, and is used to connect two words or phrases, effort means the exertion of physical or mental energy.

Related Expressions