|
Seeing that the trees are losing their leaves, I'm convinced that autumn is approaching. |
|
A strong indication of the arrival of autumn is when the trees start losing their leaves. |
|
The leaves certainly don't, fall from the trees until autumn has begun. |
|
We realise that autumn has come when the trees begin losing their leaves. |
|
It is clear that it is only in early autumn that the trees become bare. |