用whant to do sth,try to do ,there be,not.but...,take sb sth,

i don't know what to do
she tried to finish her homework
there is a dog in front of me
i will take an umbrella with me in case of rain
our teacher will take us to a place to visit
there is not a pen but a ballpen
it is time for lunch
it is time to have lunch
i'm glad to go to school
i will tell Lucy about the story
she is good at English
she is happy with me
i give her an apple
the nurse took care of the baby carefully
she asked me to help him clean the floor
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