Example sentences of "[noun pl] we do [adv] understand " in BNC.

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1 The male does sometimes mate with one of the young female helpers but this , for reasons we do not understand , never seems to result in pregnancy .
2 Perhaps , for reasons we do not understand , the patterns of interconnections in the smell-brain are under a more versatile system of genetic control , and this allowed the rapid evolution of the neocortex , facilitating the neopallial explosion .
3 He says asthma has been becoming increasingly common for the last 20 years for reasons we do n't understand .
4 I can not say for sure that there is any risk to the carp 's health , but that is a classic case of playing around with things we do not understand !
5 We look for a hand to hold , a shoulder to weep on , another body to cling to — anything that will reassure us that we are not alone , abandoned and helpless in the face of forces we do not understand .
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