1) by the time my mother (to come) home i (to do) my homework. 2) while i (to read) yesterday my sister (to cook 3) she (to clean) the house by the time i (to cook) dinner. 4) she (to say) that she (to go) there next day. 5) when i (to write) a letter my friend (to watch) tv.

1 came,had done

2 was reading,was cooking (cooked)

3 had cleaned,cooked

4 said, would go

5 was writing,was watching (watched)

Mary shelley was 18 years old when she wrote her masterpiece titled " frankenstein "  2 fbi stands for federal bureau of investigation ; 3 simon usually goes to bed at 11 pm ; 4 i look ridiculous ( ridiculously ) in these pants. they are too bright .5 harry decided to go to college after high school graduation .6 peter very religious man, and he goes to church every sunday   ; 7 visiting disneyland made ​​a great impression on julia ; 8 mom psychologist jim complained : " i do not know how to influence his son. he is too rude and constantly lying to me . "9 distinctive feature rebecca is that she loves to stand out and be the center of attention 10 parents always worry about their children before exams and want to exam results were as good as possible . 11 " burj khalifa " is the tallest skyscraper in the world . its height is 828 meters ;

1. my mother will invite my friends tomorrow. my mother will not invite my friends tomorrow. will your mother invite your friends tomorrow? when will your mother invite your friends? 2.  usually we play football in the yard. usually we don't play football in the yard. do you usually play football in the yard? where do you usually play football? 3.  children are dancing now. childer aren't dancing now. are children dancing now? whar are children doing now? 4. yesterday we went to the cinema. yesterday we didn't go to the cinema. did you go to the cinema yesterday? where did you go yesterday? 5. my friend has lost his book just now. my friend hasn't lost his book just now. has your friend lost his book just now? what has your friend lost just now?