Grammar Tip 16: 'when' in the future....

Take a look at these two sentences. Do they sound Ok to you?

When you get to London, please give me a call, will you?
When you will get to London, please give me a call, will you?

Well done if you jumped out of your chair and said 'only the first sentence is correct'!

When can refer to time in the future, but it takes present or present perfect tense, and not future:

When you see Jim, give him my regards.
When you have cleaned the car, please wash the windows too.

Other time phrases which refer to the future but use present or present perfect tense directly after are the moment and as soon as:

The moment you get any news please let us know.
As soon as you arrive in Paris you should ring the office.

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