汉译英－从很早之前就对他们很感兴趣.

I've been interested in them for a long time.
或It is/It has been a long time since I became interested in them.

From very previous early is very interested in to them.

I've been interested in them for a long time.
或It's a long time since I became interested in them.

He was interested in them since a long time ago.

From very previous early are very interested in to them.

They have interested me for a long time.

I have been very interested in them long ago

I've been interested in them for a long time.

From very early before are very interested in to them

i have been interested in them since long long ago.