7. You’re kidding! (ON)
⇒ You’re cheating on me
8. Jack always trusts me with his secret. (CONFIDES)
⇒ Jack always confides in me.
9. I haven’t eaten this kind of food before. (TIME)      
⇒ This is the first time I have eaten this kind of food
10. When I get home, I’m going to have a shower straight away. (SOON)  
⇒  I’m going to have a shower as soon as I get home

$\text{7.}$ You’re cheating on me .  

-> S+be + cheating on sb 

$\text{8.}$  Jack always confides in me.  

-> S+ always + confide + in sb 

$\text{9.}$ This is the first time I have eaten this kind of food . 

-> This is the first time + S+ has/have + Vpp 

-> S + hasn't/haven't + Vpp + .... + before

$\text{10.}$  I’m going to have a shower as soon as I get home . 

-> S+is/am/are +going to + V-inf + as soon as + S + V(present simple )