1.He hasn't gone abroad before.

This is the first time+S+V(ed/II)...=S+have/has(not)+V(III)+before

2.She has been driving for 1 months.

3.We have been eating since it started to rain.

started/began+Ving=have/has been+Ving

started/began to V=have/has+V(III)

4.I haven't had my hair cut since I left her

S+last+V(ed/II)=S+have/has not+V(III)

5.She hasn't kissed me for 5 months.

The last time+S+V(ed/II)=S+have/has not+for/since+time

6.We haven't met for a long time.

It is+time+since/for+S+last+V(ed/II)

=>S+have/has(not)+V(III)+for/since+time.

7.How long have you had it?

When+did+S+V=How long have+S+V...?

8.I haven't had such a delicious meal before.

This is the first time+S+V(ed/II)...=S+have/has(not)+V(III)+before

9.The last time I saw him was 8 days ago

The last time+S+V(ed/II)=S+have/has not+for/since+time

10.It's Monday since I last took a bath

It's+time+since +S+last+V(ed/II)...=S+have/has not+V(III)....