If peter (come) to my place, (go) to play in the yard. if (not come) to my place, i (watch) tv. if frank’s (have) their holidays in summer, they (go) to the seaside. if they (have) their holidays in winter, they (stay) at home. if the fog (thicken), harold (put up) the tent for the night.

If Peter comes to my place, we will go to play in the yard.
If Peter does not come to my place, I will watch TV.
If Frank’s parents have their holidays in summer, they will go to the seaside.
If they have their holidays in winter, they will stay at home.
If the fog thickens, Harold will put up the tent for the night.