What's the difference between?

[RoseSpring]

What's the difference in meaning between:

Yet to be and is about too?

Here are the examples in which they were used:

1- Dinner has yet to be cooked.

2- The train is about to leave.

 

[euncu]

Maybe, for comparison you should re-write the second sentence as;
The dinner is about to be cooked.
And, for the first one you should add "the" at the very beginning.
But I think the native-speakers will just say; The dinner is almost ready (or done).

 

[bhaisahab]

What's the difference in meaning between:

Yet to be and is about too?

Here are the examples in which they were used:

1- Dinner has yet to be cooked. This simply says that dinner hasn't been cooked yet, it doesn't give any indication about when it will be cooked.

2- The train is about to leave. This says that while the train hasn't left yet, it is going to leave right now.

.

 

[billmcd]

The difference:
"...has yet to be" = hasn't started
"about to be" = hasn't started but will/could begin at any moment