human activities

rain forests

resources

humanity

younger than

older than

taller than

shorter than

We should discuss this matter in great detail.

We might discuss this matter in great detail.

We needn't discuss this matter in great detail.

We mustn't discuss this matter in great detail.

collectable

effort

government

media

as soon as we have the interview result

as soon as we were having the interview result

as soon as we had the interview result

as soon as we had had the interview result

increase

reduce

maintain

exaggerate

however

for example

therefore

moreover

frank

personal

insincere

dishonest

Only after I had realized what I had missed did they tell me about it later.

As soon as they told me about it I realized what I had missed.

Only when they told me about it later did I realize what I had missed.

They told me about it and I realized what I had missed.

are they

don't they

do they

aren't they