Answer:
The sentences in the present continuous are:
a) Jane is riding a bike this weekend.
b) I am jumping in the party right now.
c) My friend is doing the school's work tonight.
d) My mother is making a cake this weekend.
e) My friends and I are riding our bikes this weekend. We are enjoying it very much.
f) George is wearing long hair.
g) I am bringing a snack to school today.
h) I am sleeping until late tomorrow.
i) I am thinking of going to London next year.
j) I am playing computer games in my bedroom.
Explanation:
The present continuous structure is the following:
subject + am/is/are + main verb with -ing
We need to pay attention to the use of the present continuous as well before we can transform the sentences. <u>The present continuous is used to refer to actions that are taking place at the moment of speaking or that are to happen in a nearby future.</u> Notice that the present continuous cannot be used for habitual actions - that is for the simple present. That is why, in the sentences above, more changes were necessary. Instead of "all the weekends," which refers to a habitual action, for instance, we can use "this weekend".
NOTE: For letter F, I needed to change the verb. In English, "George is having long hair" is not an acceptable structure.