To fill in the gaps using the simple present or present progressive, it's important to understand the context of each sentence. The simple present tense is typically used for habitual actions or general truths, while the present progressive tense is used for actions that are happening at the moment of speaking or for temporary situations. Here are the sentences filled in appropriately:
1) He usually goes to school by bus, but today he is walking to school.
- "Goes" is used for the habitual action of going to school by bus. "Is walking" describes the temporary action of walking today.
2) Listen! The birds are singing. They always sing in the morning.
- "Are singing" indicates the action happening right now. "Sing" is a habitual action that occurs every morning.
3) What are you doing? Do you always work like that?
- "Are doing" asks about the action happening at the present moment. "Work" refers to the usual way of working.
4) I am not swimming in this lake! It is far too cold.
- "Am not swimming" describes a refusal to engage in the action at the present moment. "Is" is a state of being too cold.
5) Peter is just eating his school dinner, but I think school dinners taste horrible.
- "Is just eating" describes the action happening right now. "Think" is a state of mind, and "taste" expresses a general opinion.
6) The girls often do their homework together, but today they are not doing their homework properly!
- "Do" is used for the habitual action of doing homework. "Are not doing" indicates the current action not being done properly.
7) I sometimes go for a walk in the afternoons, but today I am working instead.
- "Go" is used for the occasional routine. "Am working" describes the current action taking place instead of the routine.
8) Christiana always feeds her cows in the morning, but Tim is feeding them today.
- "Feeds" is the habitual action done by Christiana. "Is feeding" indicates that Tim is currently performing the action.
9) Look! Isn't that Sarah? She is just going into the cinema with her boyfriend.
- "Isn't" is the contraction for "is not," questioning whether that is Sarah. "Is just going" describes the action happening at the moment.
10) Dad does not know that Tom is running in a marathon today. He will be surprised.
- "Does not know" indicates Dad's current lack of knowledge. "Is running" describes the action Tom is currently undertaking.
These answers correctly apply the simple present and present progressive tenses based on the context provided in each sentence.
