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2.5 practice examples
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2.6 A few grammar tips
The word ��data�� is plural. (����)
e.g. These data show an unusual trend.
The data are critical.

Affect is the verb ��to influence��.
Effect is the noun form of this influence
Compare to = to point out similarities between different things.
Compare with **(used more often in science) = to point out difference between similar things.
e.g. Shall I compare the to a summer��s day?

Brain tumors are relatively rare compared with more common cancers, such as those of the ��

��That�� is the restrictive(defining) pronoun �������ƣ�
��Which�� is the nonrestrictive(non-defining) pronoun  �������ƣ�
That��which�Ĺؼ��ǣ������е������DZ�Ҫ�Ļ��Dz���Ҫ�ģ���Ҫ����that, ������Ϣ���п�����which

e.g. The bike that is broken in the garage.

(��that��ʾ�кܶ����г����ڳ�������ﵥ��ָ������һ���������г�)

The bike, which is broken, is in the garge.

����which��ʾֻ��һ�����г����ˣ���������û��ָ��������г��������ص������Ϣ��

Singular antecedents (ע������ʹ�õĵ�����)
e.g Each student worries about their grade. (False)
Each student worries about her grade. (True)
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