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Indicative
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Present
I observe you observe he observes we observe you observe they observe
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Present continuous
I am observing you are observing he is observing we are observing you are observing they are observing
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Past simple
I have observed you have observed he has observed we have observed you have observed they have observed
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Past continuous
I have been observing you have been observing he has been observing we have been observing you have been observing they have been observing
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Present perfect
I will observe you will observe he will observe we will observe you will observe they will observe
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Present perfect continuous
I will be observing you will be observing he will be observing we will be observing you will be observing they will be observing
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Past perfect
I will have observed you will have observed he will have observed we will have observed you will have observed they will have observed
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Past perfect continuous
I will have been observing you will have been observing he will have been observing we will have been observing you will have been observing they will have been observing
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Future
I observed you observed he observed we observed you observed they observed
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Future continuous
I had observed you had observed he had observed we had observed you had observed they had observed
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Future perfect
I had been observing you had been observing he had been observing we had been observing you had been observing they had been observing
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Future perfect continuous
I was observing you were observing he was observing we were observing you were observing they were observing
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Conditionals
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Present
I would observe you would observe he would observe we would observe you would observe they would observe
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Present continuous
I would be observing you would be observing he would be observing we would be observing you would be observing they would be observing
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Past
I would have observed you would have observed he would have observed we would have observed you would have observed they would have observed
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Past continuous
I would have been observing you would have been observing he would have been observing we would have been observing you would have been observing they would have been observing
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Imperative
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Infinitive
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Imperative
observe Let's observe observe
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Infinitive
to observe
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