Question

0 When / Unless Sarah is in town, she always buys sweets from her favourite shop. 1 If / When Tim gets home before 8 this evening, he’ll call me.​

Answer 1

Ответ:

0 When / Unless Sarah is in town, she always buys sweets from her favourite shop.

1 If / When Tim gets home before 8 this evening, he’ll call me.

Answer 2

In the given sentences, the choice between "when" and "unless" in the first sentence, and "if" and "when" in the second sentence, depends on the intended meaning of the sentences:

1. When / Unless Sarah is in town, she always buys sweets from her favourite shop.

   • If you want to express a general truth or habit, you should use "when":
     • When Sarah is in town, she always buys sweets from her favourite shop.
   • If you want to express a condition where Sarah buys sweets only under the condition of her being in town, you should use "unless":
     • Unless Sarah is in town, she doesn't buy sweets from her favourite shop.

2. If / When Tim gets home before 8 this evening, he’ll call me.

   • Both "if" and "when" can be used in this sentence, but they convey slightly different meanings:
     • If Tim gets home before 8 this evening, he’ll call me.
       • This suggests a conditional relationship. Tim will call only if he gets home before 8.
     • When Tim gets home before 8 this evening, he’ll call me.
       • This suggests an expectation. It assumes that Tim will get home before 8, and when he does, he will call.

The choice between "when" and "if" depends on whether you are expressing a condition (use "if") or an expected event (use "when"). Similarly, the choice between "when" and "unless" in the first sentence depends on whether you are describing a general habit (use "when") or a condition that must be met for the action to occur (use "unless").