Спредложениями в past simple , их нужно сделать +, ? , -. we (read a book ) yesterday. she ( help my brother) 3 days ago/ he (draw a picture) last month. they(write a letter) last week.

1.We read a book yesterday. 
We did not read a book yesterday
Did we read a book yesterday?
2.She helped my brother 3 days ago
She did not help my brother 3 days ago 
Did she help my brother 3 days ago?
3.He drew a picture las month.
He did not draw a picture last month
Did he draw a picture last month?
4. They wrote a letter last week
They did not write a letter last week
Did they write a letter last week?

If it rains, I will not go to the park. – Если пойдет дождь, я не пойду в парк. (я не знаю, пойдет дождь или не пойдет)
If I see Mary, I will tell her. – Если я увижу Мери, я скажу ей. (я могу ее увидеть, а могу и не увидеть)
If temperature is zero, water freezes. – Если температура равна нулю, вода замерзает. (100% истина)
If you heat water, it boils. – Если вы нагреете воду, она закипит. (100% истина)
If I am free we will go for a walk-если я буду свободен,пойдем гулять
If I have some money I will buy it-если у меня будут деньги,я куплю это

Northern Ireland occupies most of the territory of this historic province . Includes six counties : Antrim, Armagh , Down, Fermanagh , Londonderry ( Derry ) and Tyrone , and 26 districts. The rolling hills surround the central lowlands, where the lake . Lough Neagh , the largest in the British Isles . The coastline is characterized by pronounced fragmentation and extends from Lough Foyle to the Mourne Mountains . Very picturesque coastal landscapes . Northern Ireland climate is temperate with mild winters and cool summers . Rainfall is quite large, and in the west of precipitation is greater than in the east.The capital and largest city - Belfast .
The correct name of this wonderful country - Great Britain , and if more precise : the United Kingdom of Great Britain and Northern Ireland. But we have to respect the UK is more often used the word England - so the biggest administrative Specific unit of the United Kingdom .
Wales - amazing full of mysterious charm of a country , part of the United Kingdom of Great Britain and Northern Ireland. This fascinating region, delighting travelers with its amazing scenery , majestic castles , a small town with narrow cobbled streets and low Victorian mansions and , of course, a distinctive national colors of its inhabitants. All this makes the country particularly popular with tourists. After all, everyone here has something exceptional, something that will only get you to the heart and make the experience an indescribable intimacy Welsh culture and nature , or , on the contrary , their incomparable magic , far from everyday life.