I will want some food by lunch.

I have wanted some food since lunch.

I had wanted food until lunch.

I will have wanted food for a while by lunch.

I will have forgotten about that.

I forget things sometimes.

I had forgotten about that.

I have forgotten that.

I need to write the essay

I have written many essays.

I had written an essay already.

I will have written an essay by then.

She will be laughing soon.

She has laughed a lot today.

She had laughed until she cried.

She has a unique laugh.

Joe had lost his lucky penny.

Joe will have lost his lucky penny.

Joe has lost his lucky penny.

Joe needs to lose his lucky penny.

They are thinking about it all the time.

They had thought about it until bedtime.

They have thought about it a lot today.

They will have thought about it a lot by then.

Sally will have wished upon a star.

Sally has wished upon a star.

Sally had wished upon a star.

Sally wishes she could wish upon a star.

They had dreamed about this for years.

They have dreamed about this for years.

They are dreaming about this for years.

They will have dreamed about this for years.

Dan is watching the entire season right now.

Dan had watched the entire season yesterday.

Dan will have watched the entire season by tomorrow.

Dan has watched the entire season in his spare time.