先は長いなあ。の英語

I've still got a lot of work to do.

We have a long way to go.

We have a long ways to go.

That's very long.

the condition of having a long distance yet to travel before reaching one's destination

It took a long long time.

It took a long, long time.

It's going to take a long time.

It will not take long.

a good while

quite a while

a good [great] while

of the time that is to follow in the future, the condition of being quite long and plentiful

for a long while

The road ahead will be long.

You spent too much time in [on] preliminaries.

You should have got to the point sooner.

It lasted a very long time.

It won't be long.

Half a year felt like such a long time, but it's gone by so fast.

It seems likely to take long.

a good long time

Will it be much longer?

This is too long.

It won't last long.

How long it is!

That's not too long.

A long day has passed on.

This is too long.

I was kept waiting for an eternity.