4 Complete the sentences with the Present Perfect Simple or Present Perfect Continuous form of the verbs in brackets. 1 Our uncle is on holiday and we (look) after his dog since Monday.
2 Tim (have) the same school uniform for two years and it's a bit small now.
3 My sister (make) her own clothes since she was a teenager.
4 Gillian (work) as a model once or twice, but she doesn't want to do it as a career.
5 Helen is very busy at university but she (not lose) touch with her friends.

1. Our uncle is on holiday and we have been looking after his dog since Monday.

In this sentence, we use the Present Perfect Continuous form because the action of looking after the dog started in the past (Monday) and is still happening in the present. The use of "since" indicates the starting point of the action.

2. Tim has had the same school uniform for two years and it's a bit small now.

In this sentence, we use the Present Perfect Simple form because we are talking about a state or situation that started in the past (Tim having the same school uniform) and continues until now. There is no indication of a continuous action or duration.

3. My sister has been making her own clothes since she was a teenager.

In this sentence, we use the Present Perfect Continuous form because the action of making her own clothes started in the past (when she was a teenager) and has been ongoing until now. The use of "since" indicates the starting point of the action.

4. Gillian has worked as a model once or twice, but she doesn't want to do it as a career.

In this sentence, we use the Present Perfect Simple form because we are talking about past actions (Gillian working as a model) that are complete and not connected to the present. There is no indication of a continuous action or duration.

5. Helen is very busy at university but she hasn't lost touch with her friends.

In this sentence, we use the Present Perfect Simple form because we are talking about a state or situation (Helen not losing touch with her friends) that started in the past and continues until now. The negative form "hasn't" indicates that the action of not losing touch has not happened.