Dear teachers,
There are the following four English adjectives,that have identical meaning in my native language, namely watchful, vigilant, wide-awake, alert.
It is most likely that there is a subtle difference, which I unfortunately couldn't apprehend.
Would you be so kind explain to me their usages in the following examples.
1. The closer the danger , the more watchful they become against it.
2. The working class ought to be vigilant to crush the reaction.
3. The guardsman must always be alert.
4. It was his first trip as trayelling salesman and he was wide-awake not to miss his chance.
Thank you in advance for your efforts.
Regards.
V.