把she studied hard 和She can catch up with the other studennts合并成一句是什么

She can catch up with the other students because she studied hard.
because表因果

she studied hard so that she can catch up with the other students.
so that表结果

She studied hard in order to catch up with the other students.
in order to 表目的

She studied so hard in order to catch up with the other students.

She can catch up with the other students because she studied hard.
because表因果

she studied hard so that she can catch up with the other students.
so that表结果

She studied hard so that she could catch up with the other students.

2, if1

She studied hard in order to catch up with the other students.

so that

She studied hard in order/so that she could catch up with the other students.
She studied hard (in order) to catch up with the other students.
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She can catch up with the other students because she studied hard