1. message / see/ your/ if / give / james / i'll / i / him . 2. do / what/you/will/if/ doesn't/he/phone ? 3. sister/lend/if/her/ask/i/will/mobile/me/my/her . 4. money/give/some/haven't/if/any/got/i'll/you/you .

1. If I see James, I’ll give him your letter.
2. What will you do if he doesn’t phone?
3. My sister will lend me her mobile, if I ask her.
4. If you haven’t got any money, I’ll give you some.