30:17
STRUCTURE
2400 Views
01:56
READING COMPREHENSION &VOCABULARY
1337 Views
01:52
The Form of Irregular Verbs
1351 Views
01:59
The Tense of the Passive Voice
1419 Views
09:31
Changing from Active into Passive
1202 Views
07:20
The Form of the Passive Voice
1404 Views
03:29
What is the Passive Voice?
1448 Views
03:45
The Form of the Active Voice
1404 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1841 Views
03:20
Since vs For
1548 Views
04:50
Have or Has
1367 Views
00:49
Key Words: Present Perfect
3227 Views
09:03
The Use of the Present Perfect
1363 Views
03:08
Meaning and Form
1410 Views
02:40
Writing Formal Letters
1400 Views
03:10
Language Use
1986 Views
09:35
Parallel Structure
1556 Views
04:35
Prepositions of Instruments and Means
1369 Views
03:27
Polite Requests
1456 Views
06:30
May as a Modal of Permission and Request
1440 Views
04:11
Can as a Modal of Permission and Request
1257 Views
02:50
عناصر الاداء
1370 Views
03:45
شركة ستيرن
934 Views
01:15
مقياس القيمة المضافة
1221 Views
02:58
مقياس الربحية
1139 Views
02:39
معايير دركر
1296 Views
03:51
مقايس الاداء
1306 Views
01:41
اتخاذ اجراءات تصحيحية
1008 Views
01:52
المرحلة الثانية من الرقابة
981 Views
02:49
مراحل الرقابة
2323 Views